Complementary feeding niches sustained by size-selective predation - S. I. Dodson (Limnology and Oceanography, 1970)

The distribution of Somatochlora semicircularis - P. M. Deaton (1970)

Alpine Lichens from Mt. Audubon, Boulder County, Colorado - Robert S. Egan (The Bryologist, 1970)

Hydrologic and Biotic Effects of Grazing vs. Non-Grazing near Grand Junction, Colorado - Gregg C. Lusby (Journal of Range Management, 1970)
The effect of grazing on the hydrology of salt-desert type rangeland has been studied near Grand Junction, Colorado for the past 14 years. Measurements of precipitation, runoff, erosion, and vegetation have been made in four pairs of watersheds. One of each pair has been grazed by cattle and sheep as is normal in the region, and the other has not been used since the beginning of the study. Measurements made 10 years apart show that all four grazed watersheds have had a slight increase in the amount of bare soil and rock and a decrease in ground cover; cover on ungrazed watersheds has remained essentially unchanged. Runoff in the ungrazed watersheds has been about 30 percent less than in the grazed watersheds and sediment yield has been about 45 percent less. The greatest change in each of the relationships occurred about 3 years after livestock were excluded from one watershed of each of the pairs. Preliminary studies indicate that within areas of similar physiography, runoff is directly related to the percentage of bare soil present on a watershed.

Dinamoebidium coloradense Spec. Nov. and Katodinium auratum Spec. Nov. in Como Creek, Boulder County, Colorado - Adam S. Bursa (Arctic and Alpine Research, 1970)

A study of false hellbore (Veratrum californicum) - K. A. Loy (1970)

Symbiosis between Euglena and damselfly nymphs is seasonal - R. L. Willey; W. R. Bowen; E. Durban (Science, 1970)
An endosymbiotic association has been demonstrated between Euglena and nymphs of three species of damselfly. The hindgut of the nymphs is inhabited by the euglenoid only during the winter. Symbiotic associations involving green euglenoids and insects are virtually unknown.

The ecological dynamics of alpine krummholz - P. B. McEvoy (1970)

Social flight displays by the grasshopper Circotettix rabula - S. Ginsburg (1970)

The Diadematus group of the orb-weaver genus Araneus north of Mexico (Araneae: Araneidae) - H. W. Levi (Bull Mus Comp Zool, 1970)

Algae of a beaver pond - V. Lawry (1970)

Effects of Size-selective Predation and Food Competition on High Altitude Zooplankton Communities - W. G. Sprules (1970)

Interment behavior in the yellow-bellied marmot (Marmota flaviventris) - Kenneth B. Armitage; J. F. Downhower (Journal of Mammalogy, 1970)
Interment Behavior in the Yellow-Bellied Marmot (Marmota flaviventris) Get access Kenneth B. Armitage, Kenneth B. Armitage Division of Vertebrate Zoology and Bio-medical Museum, Institute for Medical Research, Kuala Lumpur, Malaysia Search for other works by this author on: Oxford Academic Google Scholar Jerry F. Downhower Jerry F. Downhower Division of Vertebrate Zoology and Bio-medical Museum, Institute for Medical Research, Kuala Lumpur, Malaysia Search for other works by this author on: Oxford Academic Google Scholar Journal of Mammalogy, Volume 51, Issue 1, 20 February 1970, Pages 177–178, https://doi.org/10.2307/1378556 Published: 20 February 1970 Article history Accepted: 02 September 1969 Published: 20 February 1970

Automated recordings of body temperature from free-ranging yellow-bellied marmots - J. F. Downhower; J. D. Pauley (Journal of Wildlife Management, 1970)
A simple, portable system for the automatic collection and storage of radio-telemetry data is described. Data on the deep body temperatures of two yellow-bellied marmots (Marmota flaviventris) are reported for 3 days. The advent of radio-telemetry has initiated the development of few automated recording and tracking systems (Cochran et al. 1965, Cochran 1967). While telemetry methods provide the potential of gathering vast amounts of data on the behavior and physiology of animals, most of these data are not collected or used because datagathering techniques are inadequate. This paper describes the design of a portable, self-contained receiving and recording system for the automatic collection of telemetered data and reports some data retrieved by that system. The study was supported by an NSF Grant to K. B. Armitage, the University of Kansas. 1Present address: Section of Neurobiology and Behavior, Cornell University, Ithaca, New York. advent of radio-tel metry has inithe development of ew automated ding and tracking systems (Cochran l. 1965, Cochran 1967). While telemetry ods provide the potential of gathering METHODS Our design criteria were as follows: (1) portability; (2) low maintenance; (3) 100200 m range; (4) high reliability. A block diagram of this system is given in Fig. 1. An incoming signal from a temperaturesensitive, pulsed transmitter (Pauley et al. 1968) is received by a portable receiver (Shirer and Downhower 1969). The receiver runs continuously; its output is connected to a battery-operated, portable tape recorder. (The tape recorder should have a capstan drive and an effective AGC (Consumer's Reports 1969) through a switching circuit controlled by a windup clock.) The switching circuit turns on the tape recorder for about 80 seconds every 30 minutes and allows the output from the This content downloaded from 40.77.167.51 on Tue, 04 Oct 2016 05:07:34 UTC All use subject to http://about.jstor.org/terms 640 Journal of Wildlife Management, Vol. 34, No. 3, July 1970

Larval food plants for Colias alexandria: a survey of the distributions of Lathyrus leucanthus and Vicia americana near Gothic, Colorado - L. R. G. Snyder (1970)

A Monograph of the Lupinus ornatus Complex - B. J. Cox (1970)

The population structure of Erebia epipsodea (Lepidoptera: Satyrinae) - Peter F. Brussard; P. R. Ehrlich (Ecology, 1970)
The satyrine butterfly Erebia epipsodea shows a population structure unlike that of any other butterfly studied in detail. Rather than being divided into numerous small populations which only rarely exchange individuals, E. epipsodea occurs in vast, effectively panmictic populations which may cover hundreds of square kilometers. There is a great deal of individual movement, and the butterflies are able to recognize and leave ecologically unsuitable areas. Such areas do not, however, seem to pose substantial barriers to their movement.

Pharyngeal and lingual adaptations in the beaver - R. W. Coles (Journal of Mammalogy, 1970)
Journal Article Pharyngeal and Lingual Adaptations in the Beaver Get access Richard W. Coles Richard W. Coles The Biological Laboratories, Harvard University, Cambridge, Massachusetts (present address: Joint Science Department, the Claremont Colleges, Claremont, California 91711). Search for other works by this author on: Oxford Academic Google Scholar Journal of Mammalogy, Volume 51, Issue 2, May 1970, Pages 424–425, https://doi.org/10.2307/1378510 Published: 01 May 1970 Article history Accepted: 23 January 1970 Published: 01 May 1970

The behavioural ecology of desert grasshoppers. I. Presumed sex-role reversal in flight displays of Trimerotropis agrestis - R. L. Willey (Animal Behaviour, 1970)
The observations during 3 years and four separate visits to the localities through the season indicate that Dr Tinkham may have observed the rarely heard virginal or, more probably, normal disturbance-induced flights of females during the early part of the adult season and at times of the day when males are least active in flights.

Alpine vegetation and soils of Mesa Seco Plateau, San Juan Mountains, Colorado - Kenneth E. Johnson (1970)

Sage-grass and aspen - C. Hodge (1970)

Adult behavior and population structure in Erebia epipsodes (Lepidoptera: Satyrininae) - Peter F. Brussard; P. R. Ehrlich (Ecology, 1970)

The growth rate of Veratrum californica - A. Morris (1970)

Contrasting population biology of two species of butterflies - Peter F. Brussard; P. R. Ehrlich (Nature, 1970)

A change in status of Lupinus homicola var. tetonensis - B. J. Cox; D. B. Dunn (Transactions of the Missouri Academy of Science, 1969)

Dikes of the McClure mountain — Iron mountain alkalic complex, Fremont county, Colorado, U.S.A. - E. Wm Heinrich; D. H. Dahlem (Bulletin Volcanologique, 1969)

The biosystematics of the Lupinus argenteus complex and allies - Lloyd William Hess (1969)
"Introduction: For many years there has been great confusion in the nomenclature of Lupinus. Many authors have contributed numerous names as they interpreted the morphological variations. Since the work of Sereno Watson (1873) there has not been an attempt to make a monographic study of the perennial lupines of the United States. Individual authors have attempted to work up the treatment of Lupinus for their particular state without reference to the taxa described in neighboring areas. It was believed that a careful monographic study of related taxa was badly needed and could help clear-up some of the confusion. The large flowered members of the Lupinus argenteus complex and its apparent relatives were selected as a group extending widely in the Rocky Mountain area, which could be studied as a starting point. Since three taxa of this group existed in the Crested Butte area (near the Rocky Mountain Biological Laboratory) it was believed that work on the possible genetic barriers could be utilized in interbreeding studies to shed some additional light on the relationships within the group. No biosystematic technique, such as breeding studies, has been used in the previous studies. The present study then is the first attempt at a monograph on this related segment of Lupinus using both field work and the extensive collections that have been accumulated to date. Field collections were made throughout the extensive range of the Great Basin and western face of the Rockies inhabited by the various members of this group. Collections of various other workers and the major herbaria of the area were also used. The ecology, geography, and especially the monographic comparisons and breeding studies have hopefully given an improved understanding of the relationship within this complex. From this understanding of the genetically significant groups, as biological populations of nature, the taxa are defined and interpreted. An understanding of the extremely varied ecology of the extensive range involved, as well as its cataclysmic geological history is important to an understanding of the evolution and hence the phylogeny of the taxa of the complex. For this reason the geological history, especially glaciation, has been reviewed and related since most of the range has probably been invaded in post glacial times. The basic ecology of the range is also considered. Chromosome numbers have been counted but are of little value in the biosystematics of these lupines since they are octaploid and are extremely small. This and other unique problems pertaining to the interpretation of the speciation of polyploids have also been reviewed."--Page 1.

Ecology of aspen in Gunnison County, Colorado - M. D. Morgan (American Midland Naturalist, 1969)
The ecology of quaking aspen was studied in Gunnison County, Colorado. In the study area, aspen stands often take the form of small islands surrounded by fescue grasslands. At its upper altitudinal limits, aspen generally abuts the spruce-fir forest. The greatest number of trees were 4- to 7-in DBH with only a few being greater than 10-in DBH. Aspen reproduction is evident, but many of the trees below 4-in DBH were dead. The aspen understory is very lush and is characterized by many tall herbaceous species. The disjunct distribution of several understory species does not seem related to soil or aspect conditions. Aspen soils are generally more fertile than adjacent spruce-fir or fescue grassland soils. All soils possessed several characteristics of immature soils: 1) little variation in silt and clay content throughout the profile, 2) little horizon and structural development, and 3) little variation in per cent base saturation throughout the profile. Aspen seed retained good viability after cool storage for 1 1/2 years. The pattern of morphological characteristics, site conditions, and leafing times is much more complex than that reported in other areas in the central Rocky Mountains. Aspen appears to be successional to spruce-fir in the present study area, although in local sites that may be inaccessible to a spruce-fir seed source the present mosaic pattern of aspen groves within fescue grassland or sagebrush may persist.

Adaptive significance of pigment polymorphism in Colias butterflies. II. Thermoregulation and photoperiodically controlled melanin variation in Colias eurytheme - W. B. Watt (Proceedings of the National Academy of Science, 1969)

A note on the occurrence of violarite, Copper King Mine, Boulder County, Colorado - William H. Bird (Economic Geology, 1969)
Violarite from the Copper King mine, Boulder County, Colo., occurs as a secondary mineral after pentlandite. It is associated with fresh pyrrhotite and with several altered forms of pyrrhotite including secondary pyrite after pyrrhotite. Hence violarite has a much broader stability range in the oxidation environment than was previously suspected.

Visual and acoustical social displays by the grasshopper Arphia conspersa (Orthoptera: Acrididae) - R. L. Willey (Psyche, 1969)

Carbon Isotopes in Pelites of the Precambrian Uncompahgre Formation, Needle Mountains, Colorado - F. R. E. D. BARKER; IRVING FRIEDMAN (Geological Society of America Bulletin, 1969)
Research Article| July 01, 1969 Carbon Isotopes in Pelites of the Precambrian Uncompahgre Formation, Needle Mountains, Colorado FRED BARKER; FRED BARKER U.S. Geological Survey, Denver, Colorado Search for other works by this author on: GSW Google Scholar IRVING FRIEDMAN IRVING FRIEDMAN U.S. Geological Survey, Denver, Colorado Search for other works by this author on: GSW Google Scholar GSA Bulletin (1969) 80 (7): 1403–1408. https://doi.org/10.1130/0016-7606(1969)80[1403:CIIPOT]2.0.CO;2 Article history received: 04 Nov 1968 first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation FRED BARKER, IRVING FRIEDMAN; Carbon Isotopes in Pelites of the Precambrian Uncompahgre Formation, Needle Mountains, Colorado. GSA Bulletin 1969;; 80 (7): 1403–1408. doi: https://doi.org/10.1130/0016-7606(1969)80[1403:CIIPOT]2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract Carbon isotopic ratios and weight percentages of carbon were measured in 15 samples of slate, phyllite, and schist of the approximately 1500- to 1600-m.y.-old Uncompahgre Formation of the Needle Mountains, southwestern Colorado. Rocks with less than 1 percent total carbon, all of which is reduced, have δC13 values of −23 to −28 per mil, whereas those with 1 to 6.4 percent carbon have δC13 from −29 to −31 per mil. In general, the slates and phyllites contain more carbon and isotopically lighter carbon than do the schists of higher metamorphic rank. Increasing loss of C12-enriched methane with increasing intensity of metamorphism is suggested to account for these differences. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.

Flora of the Gunnison basin: a study in the distribution of plants - J. Barrell (1969)

Micro-environment of the water ouzel - J. Wahl (1969)

The taxonomy and ecology of the tiger salamander of Colorado - R. W. Reese (1969)

A study of plant succession on the Gothic earthflow - S. Turbak (1969)

Flexural Slip as Indicated by Faulted Lava Flows along the Grand Hogback Monocline, Colorado - Frederick N. Murray (The Journal of Geology, 1969)
Lava flows southwest of Glenwood Springs, Colorado, have been broken by numerous faults with a few tens to several hundreds of feet of perpendicular separation. Flexural slip in steeply upturned Upper Cretaceous and Tertiary strata beneath the lava flows is believed to be responsible for this faulting. Tilting of the basalt and adjoining basalt gravel surfaces, as well as simple flexural-slip model experiments, seems to indicate that faulting was the result of a partial unfolding of previously folded strata. Subsidence of the uplift between Glenwood Springs and Carbondale or rise of the basin in the vicinity of the faulted lava by a few thousand feet since the basalt was formed is offered as an explanation.

Flora of the Gunnison Basin, A study in plant distribution - J. Barrel (1969)

Home range and longevity in Zapus princeps in Colorado - L. G. Myers (American Midland Naturalist, 1969)

Sound location of insects by the dwarf weasel - R. L. Willey (American Midland Naturalist, 1969)

The geology of Treasure Mountain Dome - F. Mutschler (1969)

A brief survey of the mushrooms in the spruce-fir forest of the Gothic, Colorado area - D. B. Dunn (1969)

Introductory field investigation of the distributional ecology of the Anostraca (Crustacea) of north-central Gunnison County, Colorado - P. L. Nelson (1969)

Field studies on Peromyscus maniculatus - S. J. Graetz (1969)

Radio tracking of dispersing yellow-bellied marmots - H. W. Shirer; J. F. Downhower (Transactions of the Kansas Academy of Science, 1969)

A new sibling Papilio from the Rocky Mountains, with genetic and biological notes (Insecta, Lepidoptera) - C. L. Remington (Postilla, 1968)

Water ouzels - S. Wise (1968)

The activity schedules of some small mammals of the Gothic Area - K. R. Lamar (1968)

A vegetational comparison of the Gothic and Galena Mountain areas - B. J. Cox (1968)

Growth substances from Veratrum tenuipetalum - H. Olney (Plant Physiology, 1968)

Adaptive significance of pigment polymorphism in Colias butterflies. I. Variation of melanin pigment in relation to thermoregulation - W. B. Watt (Evolution, 1968)

Introduction to a study on the diatom distribution in the East River, Gunnison County, Colorado - S. M. Miller (1968)

Water resource development in the Arkansas Valley - John Robert Ferrell (SHAREOK (University of Oklahoma), 1968)
o c i e t y ^" P o rk L overs Are No C r e d it to Our D em ocracy," Life, LV (S ep te m b er 6 , 1 9 6 3 ), I4., * Ib id .

Habitat of Pocket Gophers in Cochetopa Creek Drainage, Colorado - Roger Hansen; R. F. Beck (American Midland Naturalist, 1968)
Comparisons were made between some characteristics of soils and vegetation for sites supporting Thomomys talpoides and for adjacent sites not occupied by these pocket gophers in alpine, subalpine and shrub-grassland habitats in the Cochetopa Creek drainage, Colorado. Different species of bluegrasses (Poa spp.), sedges (Carex spp.), cinquefoils (Potentilla spp.), and bluebells (Mertensia spp.) occurred in the alpine, subalpine, and shrub-grasslands. There were 16 species of plants common to the alpine and subalpine, three species of plants oc- curred in both the subalpine and shrub-grasslands and two species occurred in both the shrub-grasslands and the alpine. Alpine skyrocket (Androsace septentrionalis puberulenta) occurred in all three habitats. Plant composition was very similar between sites occupied by pocket gophers and adjacent unoccupied sites. Those differences detected did not appear great enough to account for the presence or absence of pocket gophers. Soils in the alpine were shallower where gophers occurred than were soil depths on unoccupied sites, but in the subalpine and shrub-grasslands soils were deepest at sites occupied by pocket gophers. In general, soils were deep enough to support pocket gopher burrows at all sites sampled. There was a decrease in mean soil temperature with an increase in elevation. Soils inhabited by gophers in the shrub-grasslands varied from about 7% to 12% moisture and those in the subalpine and alpine varied from about 25% to 55%. The rock composition of soils occupied by pocket gophers and adjacent unoccupied soils was similar in the subalpine but in both the alpine and shrub-grasslands the unoccupied soils contained more rocks larger than one-half inch in diameter than did soils supporting pocket gophers. Some pocket gopher mounds were made up of 40% rocks (larger than one-fourth inch in diameter) in the shrub-grasslands, up to 31% in the alpine and as much as 16 % in the subalpine. Pocket gopher mounds contained fewer large rocks than did the topsoil at sites occupied by pocket gophers. It appears that pocket gophers could occupy more area in the alpine, subalpine, and shrub-grasslands than they now occupy.

A vegetational comparison of the Gothic and Galena Mountain area - B. J. Cox (Transactions of the Missouri Academy of Science, 1968)

Factors affecting the dispersal of yearling yellow-bellied marmots - J. F. Downhower (1968)

A study of natural pollution in Paradise Valley, Colorado - Rodney J Richards (Journal of the Colorado-Wyoming Academy of Science, 1968)

Brandon Field, Kiowa County, Colorado - John Stoddard (Mountain Geologist, 1968)
ABSTRACT: Brandon field, first commercial Mississippian oil production in Colorado, located in Kiowa County in southeastcrn Colorado, was discovered in August, 1965. Initial completion was madc in carbonate rocks of the Osagcan Series (Mississlppian) at a depth of 4770 fect. The twentyfour producing wclls drilled to datc have cstablishcd production also from the Mississippian St. Louis. Spergen and Warsaw Formations, covering a stratigraphic interval of 300 fcet. Petroleum is entrappcd in a large anticlinal structurc that shows cvidence of early Palcozoic growth, this anticline now is locatcd along the northeast trending Las Animas arch, which generally is considercd to be a Laramidc fold. Uniquc cxploitation problems are caused by a very low rescrvoir prcssure, heterogencous development of porosity and an extensive fracture system. Cumulative oil production through March 1968 was over 1, 200, 000 barrels.

New County Records in the Herpetofauna of Colorado - D. M. Secoy; Wesley M. Brown (The Southwestern Naturalist, 1968)

Phenetics of natural populations. IV. The population asymmetry parameter in the butterfly Coenonympha tullia - M. E. Soule; B. Baker (Heredity, 1968)

Electrophoretic study of chipmunk blood near Gothic, Colorado - L. Oakland (1968)

The Colorado River International Boundary - James E. Hill (Journal of Geography, 1968)

Plant-herbivore coevolution: lupines and lycaenids - D. E. Breedlove; P. R. Ehrlich (Science, 1968)
Predation on lupine flowers by larvae of a lycaenid butterfly was studied by comparison of inflorescences exposed to and protected from infestation, and by comparison of lupine populations exposed to different degrees of attack. The lycaenids caused striking reduction in seed set, indicating that this small herbivore could act as a potent selective agent in lupine populations.

Suture-zones of hybrid interaction between recently joined biotas - C. L. Remington (Evolutionary Biology, 1968)
From a study of the geographic occurrences of contemporary hybridization among North American animals, it has become apparent that most of the hybrids are produced in a few relatively localized zones, with little hybridizing in the vast areas between these zones of mixing.

2,4‐D Herbicide, Vegetation, and Pocket Gopher Relationships Black Mesa, Colorado - Howard P. Tietjen; Curtis H. Halvorson; Paul L. Hegdal; Ancel M. Johnson (Ecology, 1967)
In a 7—year study on Black Mesa, Colorado, elevation 10,000 ft 2,4—D herbicide treatment initially reduced forb abundance and northern pocket gopher (Thomomys talpoides) populations 80% to 90%. Both forbs and pocket gophers remained at low levels on one area but returned to pretreatment levels on the other area. The decline in pocket gopher numbers was caused by an inability to survive where their preferred food (forbs) was eliminated by herbicide treatment. The decline was not caused by movements of the animals from sprayed areas, or by direct or indirect toxicity of 2,4—D. The common grasses offer, at best, only a marginal diet for northern pocket gophers; only succulent grasses or those bearing corms or rhizomes yield a subsistence diet. Limited sampling did not indicate that the spray treatment affected the numbers of other small mammals.

The phenetic relationships of the butterflies. I. Adult taxonomy and the non-specificity hypothesis - A. H. Ehrlich; A. H. Ehrlich (Systematic Zoology, 1967)
The relationships of adult butterflies were evaluated using the techniques of numerical taxonomy and various sets of characters. Using a total of 196 characters of the external and internal anatomy produced phenograms quite similar to the one arrived at by classical taxonomic techniques. There were, however, significant differences (e.g., relatively low similarity of the Papilionidae and Pieridae). Relationships based on most subsets of characters showed a “family resemblance” to one another and to the classical relationships. Relationships based on 96 internal and 100 external characters were compared by a randomization test. When evaluated by correlation coefficients the internal and external relationships were significantly different. When evaluated by distances they were not. Our results in general seem to support a “weak” version of the nonspecificity hypothesis—analysis of different large samples of characters ordinarily will yield positively correlated but non-identical patterns of relationship. This study has led to an appraisal of ideas of general classification and the utility of numerical taxonomy. Theoretical considerations make it seem unlikely that the idea of “overall similarity” has any validity. In any case it is clear that overall similarity cannot be dealt with operationally. All classifications are inherently special, and no one special classification is any more or less “correct” than any other. It is suggested that numerical taxonomy is a more sophisticated tool than is required for doing most routine taxonomic jobs. Numerical taxonomy, however, can be used in those situations where refined answers seem to be desirable, either where economic problems are involved or where light can be shed on general problems of population biology.

Zygospores and spore appendages of Harpella (Trichomycetes) from larvae of Simuliidae - R. W. Lichtwardt (Mycologica, 1967)
Larvae of black flies (Simuliidae) serve as hosts for a number of Trichomycetes. Not infrequently several taxa of these fungi occur simultaneously in individual larvae. The larval hindguts may contain, for instance, species of the genus Paramoebidium (Amoebidiales) to? gether with species of one or more genera of the Genistellaceae (Harpellales), while their midguts frequently harbor Harpella melusinae Leger & Duboscq. This rich representation of Trichomycetes is not unusual in black fly populations in the United States, nor in some species in France (Tuzet and Manier, 1955). The Trichomycetes inhabiting the hindguts of black fly and other Diptera larvae will be the subject of subsequent publications. This paper is concerned with the genus Harpella. Zygospores are documented for the first time as well as structural features of the peculiar appendages borne by the asexual spores.1 Considerable field work with Harpella during the past 6 years has convinced me that the genus, as we now know it, consists of a single species inhabiting a variety of simulid larvae. Harpella melusinae was described by Leger and Duboscq in 1929. It was attached by means of a holdfast to the peritrophic membrane of Simulium ornatum Meig. The thalli were described as simple, at first uninucleate becoming coenocytic, then by septation dividing into uni? nucleate cells. From the distal end of each cell arose a lateral, curved spore (conidium) that served as a means of asexual reproduction. No mention of spore appendages was made in their first paper, but Leger and Gauthier in 1935 illustrated the spore of H. melusinae and showed it bearing 4 basal appendages. Leger and Duboscq (1929) described two situations that they inter? preted as being sexual processes. The first, termed automixis, involved

A study of the behavior of Eutamias near Gothic, Colorado - L. A. Wheeler (1967)

Bayou Salado: The Story of South Park by Virginia McConnell, and: Uncompahgre Country by Wilson Rockwell - Maynard Fox (Western American Literature, 1967)

Census of a beaver colony - R. T. Paul (1967)

Pinus aristata (Pinaceae) in Boulder County, Colorado: Northward Extension of Its Known Colorado Range - Erik K. Bonde (The Southwestern Naturalist, 1967)

Helminth Parasites of the Prairie Rattlesnake, Crotalus viridis Rafinesque, 1818, in Weld County, Colorado - Elmer A. Widmer (The Journal of Parasitology, 1967)
The prairie rattlesnake, Crotalus viridis Rafinesque, 1818, is available in large numbers in Weld Co., Colorado, and since virtually no information was available on parasitism of C. viridis, additional studies were made.

Jointing in Sedimentary Rocks along the Grand Hogback Monocline, Colorado - Frederick N. Murray (The Journal of Geology, 1967)
Removal of strata dip-and-strike effects at each collecting station by rotation in three-dimensions increases resolution of data concerning the orientation of joint surfaces in sedimentary rocks. Contoured equal-area diagrams of unrotated and rotated joints illustrate the changes in joint plane pole maxima. Jointing in sedimentary rocks upturned along two trends of the Grand Hogback Monocline, Colorado, is inferred as being related to vertical uplift rather than to horizontal compression or superposition of a regional joint system. The joints may have been caused by tensional stresses developed within the strata by the inherent slowness of rocks to relax from a prestressed condition created by deep burial.

Baculite Mesa, Pueblo County, Colorado - Lyle E. Nesbitt (Rocks & Minerals, 1967)

Stratigraphy and Structure of Tertiary Rocks in Central South Park, Park County, Colorado - Efraim Lozano (Mountain Geologist, 1967)
ABSTRACT: Tertiary rocks more than 5,000 feet thick outcrop in central South Park, Colorado; they include continental sediments and volcanics. These rocks have been previously divided into several formations, from youngest to oldest: Denver Formation (Eocene), and lower andesite of the Thirtynine Mile volcanic field, Agate Creek Formation (ash flow-4), and Antero Formation (all of Oligocene age). A newly-recognized unit, the Hatsel Formation, is probably of Pliocene and Pleistocene age. Major unconformities separate Oligocene rocks from older and younger beds. The formations of Oligocene age are separated from each other by minor unconformities. The Denver Formation and older rocks were deformed during the Laramide orogeny. The Oligocene rocks were mildly folded and faulted by later Tertiary deformation in late Oligocene to Miocene time. The main structural features of the area are the Antero and High Creek synclines, and the Santa Maria fault (new name).

Barriers to gene flow in natural populations of grasshoppers. I. The Black Canyon of the Gunnison River and Arphia conspersa - R. L. Willey (Psyche, 1967)

Probable existence of synergistic interactions among different species of protozoans - J. Cairns (Revista de Biologia, 1967)

A vegetation study on an earthflow in Gunnison County, Colorado - L. M. Foster (1966)

A study of key characteristics for distinguishing several Drosophila affinis subgroup species, with a description of a new related species - R. L. Sulerud; D. D. Miller (American Midland Naturalist, 1966)
Ralph L. Sulerud, Dwight D. Miller, A Study of Key Characteristics for Distinguishing Several Drosophila affinis Subgroup Species, with a Description of a New Related Species, The American Midland Naturalist, Vol. 75, No. 2 (Apr., 1966), pp. 446-474

A comparative study of the macroscopic fauna of small subalpine lakes at Mexican Cut, Colorado - M. Walter (1966)

A field comparison of two methods of determining the home range of mice - D. H. Wise (1966)

Review: War for the Colorado River, by John Upton Terrell - Norris Hundley (Pacific Historical Review, 1966)
Book Review| May 01 1966 Review: War for the Colorado River, by John Upton Terrell War for the Colorado RiverJohn Upton Terrell Norris Hundley Norris Hundley Search for other works by this author on: This Site PubMed Google Scholar Pacific Historical Review (1966) 35 (2): 236–239. https://doi.org/10.2307/3636690 Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Cite Icon Cite Search Site Citation Norris Hundley; Review: War for the Colorado River, by John Upton Terrell. Pacific Historical Review 1 May 1966; 35 (2): 236–239. doi: https://doi.org/10.2307/3636690 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentPacific Historical Review Search This content is only available via PDF. Copyright 1966 The Pacific Coast Branch, American Historical Association Article PDF first page preview Close Modal You do not currently have access to this content.

Food habits of two sympatric Colorado sciurids - W. M. Carleton (Journal of Mammalogy, 1966)
The golden-mantled ground squirrel (Citellus lateralis lateralis) and the least chipmunk (Eutamias minimus consobrinus) were studied in the mountains of west central Colorado where the two species are sympatric and display marked similarities in habitat selection, life cycles and general behavior patterns. Detailed investigation of the energy relationships and food habits of these animals, including field observations, stomach-content analyses and food preference tests, demonstrated a slight divergence in general food preferences and a profound dependence by both species upon the common dandelion (Taraxacum officinale) for summer food. This plant provided more than 80% of the June–August diet of both chipmunk and mantled squirrel. The chipmunk preferred and consumed the flowers, seeds, and seed-laden heads of the dandelion, while the mantled squirrel preferred the stems and rarely ate the heads or seeds. These behavior patterns effectively removed, in part, the two sciurids from direct competition for energy sources in summer although their foraging territories greatly overlapped.

Mountain mosquitoes of the Gothic, Colorado area - M. E. Smith (American Midland Naturalist, 1966)
Mosquito species inhabiting a high mountain area (9000 to 12,000 feet) in south-central Colorado west of the Continental Divide comprised 11 Aedes, 4 Culiseta, 1 Culex, and 3 chaoborines. They can be placed by altitudinal associations in two major groups: 1) mountain species, subdivided into alpine (A. impiger) and subalpine (A. cataphylla, communis, hexodontus, implicatus, and pullatus; Culiseta incidens, impatiens, inornata; probably Aedes fitchii and Culiseta alaskaensis), and 2) valley and foothill species (Aedes cinereus, dorsalis, increpitus, spencerii idahoensis, and Culex tarsalis). Seasonal development, abundance, and species dominance, as shown by four seasons of collecting, are discussed and illustrated by charts; notes on habits of adults and habitats of larvae, with associated species and collection records, are given for each species, along with pertinent taxonomic observations. The origin of the faunal elements represented by the 28 species of the Colorado Rockies is discussed. One species of mosquito (Aedes trichurus Dyar), taken east of the study area, and one chaoborine (Eucorethra underwoodi Und.) are listed as new state records.

Dawsonite in the Green River Formation of Colorado - J. E. Smith; Charles Milton (Economic Geology, 1966)
Dawsonite (NaAl (OH) 2 CO 3 ) is relatively abundant (up to 25 percent) as a rock-forming constituent of a zone within the Green River oil shales in the Piceance Creek Basin, Colorado, and also occurs in Pleistocene ash beds, Olduvai Gorge, Tanzania. The mineral is most readily distinguished from other carbonates of the Green River Formation by optical properties and X-ray diffraction. 9In five of the seven known occurrences, the formation of dawsonite has been related to hydrothermal activity connected with volcanic episodes, with varying ore mineralization.9 The Green River and Olduvai Gorge occurrences, however, are ascribed to reaction of carbonate solutions with nepheline of the original sediments.

California's Stake in the Colorado River a - D. N. Cole (Groundwater, 1966)
Abstract California has an enormous stake in the Colorado River. In the southern portion of the State, 80 percent of the water used is furnished by the Colorado River, and this area needs still more water in the immediate years ahead. But it cannot get more from the natural supply of the Colorado. The river is already over‐committed, and California in fact may have to cut back on its present take from that source. This is not the Colorado River in Texas; Los Angeles has gone hundreds of miles to get water, but has not reached that far east‐yet.

The Fremont Butte, Washington Co., Colorado, Meteorite - GLENN I. HUSS; CARLETON B. MOORE; PETER R. BUSEK (Meteoritics, 1966)
Abstract The Fremont Butte meteorite was found near Fremont Butte, Colorado, in 1963. A single individual was found weighing 6.6 kg. It is an olivine‐hypersthene or L group chondrite showing brecciation and a small number of well formed chondrules and olivine phenocrysts.

A comparative study of the fine structure of the trophoblast in several hemochorial placentas - A. C. Enders (American Journal of Anatomy, 1965)
AbstractPortions of the labyrinth or villi of placentas from late pregnancy from nine species in four orders of mammals were examined with the electron microscope. Pronounced patterns of layering of the trophoblast were found in these placentas which were all of the hemochorial type. The laboratory rat, laboratory mouse, hamster, and deer mouse have three layers of trophoblast between the maternal blood space and fetal vessels (hemotrichorial), the rabbit two layers (hemodichorial), the guinea pig and chipmunk one layer (labyrinthine hemomonochorial), and the human and armadillo one layer (villous hemomonochorial).The outer layer of trophoblast of the hemotrichorial placentas (the layer next to the maternal blood) is cellular, but the next two layers are apparently syncytial and are closely apposed to one another. The outer layer of the rabbit placenta is syncytial, while the inner layer contains some pockets of cells. In all of the hemomonochorial placentas examined, the continuous layer of trophoblast was syncytial. It was found that the surface layer of trophoblast of all the placentas studied is rich in granular endoplasmic reticulum, whereas in subsequent layers this element is less abundant. All of the placentas show both surface and basal modifications of trophoblast, but caveolae (pinocytotic vesicles) were found to be most commonly located in crypts, pockets, or other regions somewhat removed from the surface. It is suggested that an area of relative stasis of maternal plasma may be important for absorption of some substances by the placenta.

Vernal behaviour of the yellow-bellied marmot (Marmota flaviventris) - Kenneth B. Armitage (Animal Behaviour, 1965)
The dispersal was associated with changes in home ranges and with the avoidance of dominant animals by subordinate animals, and females moved from being concentrated in the centre of the colony to being more widely dispersed during the vernal period.

Adaptation of heart and lung weight to high altitude in the robin - W. A. Dunson (Condor, 1965)
Journal Article Adaptation of Heart and Lung Weight to High Altitude in the Robin Get access William A. Dunson William A. Dunson Department of Biology, Yale University, New Haven, Connecticut Present address: Department of Zoology, University of Michigan, Ann Arbor, Michigan Search for other works by this author on: Oxford Academic Google Scholar The Condor, Volume 67, Issue 3, 1 May 1965, Pages 215–219, https://doi.org/10.2307/1365399 Published: 01 May 1965

Genesis of the White Cloud and Related Pegmatites, South Platte Area, Jefferson County, Colorado - C. VANCE HAYNES (Geological Society of America Bulletin, 1965)
Research Article| April 01, 1965 Genesis of the White Cloud and Related Pegmatites, South Platte Area, Jefferson County, Colorado C VANCE HAYNES, JR. C VANCE HAYNES, JR. Dept. Geology, University of Arizona, Tucson, Ariz. Search for other works by this author on: GSW Google Scholar GSA Bulletin (1965) 76 (4): 441–462. https://doi.org/10.1130/0016-7606(1965)76[441:GOTWCA]2.0.CO;2 Article history received: 19 Mar 1962 rev-recd: 12 May 1964 first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation C VANCE HAYNES; Genesis of the White Cloud and Related Pegmatites, South Platte Area, Jefferson County, Colorado. GSA Bulletin 1965;; 76 (4): 441–462. doi: https://doi.org/10.1130/0016-7606(1965)76[441:GOTWCA]2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract The writer mapped in detail the geology of an area of approximately 12 square miles, including South Platte, Colorado, to ascertain the geologic setting of large, concentrically zoned, rare-earth-bearing pegmatite bodies. These occur within granite of the northeastern portion of the Pikes Peak batholith. The outer batholithic zone of granite contains platy flow structure concentric with the concordant contact between the batholith and metasomatized metamorphic wall rocks, indicating emplacement of a mobile magma in the mesozone. Pegmatite and aplite dike emplacement, as well as development of tensional quartz veins with deuteric wall rock alteration and fluorite veins, mark the late stages of batholith formation.The rare-earth-bearing pegmatite bodies are lens-or pod-shaped, with quartz cores surrounded by four concentric but commonly incomplete zones. These zones are generally: (1) wall zones of graphic granite; (2) outer-intermediate zones of biotite, cyrtolite, and perthite; (3) middle-intermediate zones of giant perthite crystals; and (4) inner-intermediate zones of euhedral fluorite crystals. Compromise surfaces between some minerals are interpreted as evidence of simultaneous growth; crystallization is believed to have proceeded from the pegmatite walls inward following Bowen's reaction series.Replacement at the White Cloud pegmatite consists of perthite by albite, fluorite by yttrofluorite, yttrofluorite by doverite, quartz and allanite by fluorite, biotite by hematite, quartz by sericite, and gadolinite by an unidentified fluocarbonate of yttrium with an X-ray structure similar to bastnae-site. Several rare-earth minerals have not been identified.Pegmatite emplacement is believed to have taken place by: (1) liquid segregation in a giant miarole, or (2) autointrusion, or (3) a combination thereof in the early stages of batholith crystallization. Paragenesis is interpreted in the light of recent laboratory findings of other workers supporting resurgent boiling and the action of a vapor phase as a transfer medium in replacement. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.

NON-ANATECTIC MIGMATITES IN GILPIN COUNTY, COLORADO - PAUL D. LOWMAN (Geological Society of America Bulletin, 1965)
Research Article| September 01, 1965 NON-ANATECTIC MIGMATITES IN GILPIN COUNTY, COLORADO PAUL D LOWMAN, JR. PAUL D LOWMAN, JR. NATIONAL AERONAUTICS AND SPACE ADMINISTRATION, GODDARD SPACE FLIGHT CENTER, GREENBELT, MD. Search for other works by this author on: GSW Google Scholar GSA Bulletin (1965) 76 (9): 1061–1064. https://doi.org/10.1130/0016-7606(1965)76[1061:NMIGCC]2.0.CO;2 Article history received: 05 May 1965 first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation PAUL D LOWMAN; NON-ANATECTIC MIGMATITES IN GILPIN COUNTY, COLORADO. GSA Bulletin 1965;; 76 (9): 1061–1064. doi: https://doi.org/10.1130/0016-7606(1965)76[1061:NMIGCC]2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract To test the anatectic theory of migmatite formation, modal analyses and field studies were made of migmatites in Gilpin County, Colorado, and adjoining areas. The metasomes of a significant number of these migmatites were found not to fit the presently accepted definition of granite as a rock containing roughly equal proportions of quartz, orthoclase, and plagioclase. Field relationships show that many of the migmatites were derived from granite pegmatite dikes. Therefore, if anatexis is a factor in the genesis of the migmatites in this area this process must be relegated to a more remote stage of magma generation. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.

Larval differences between Aedes communis (DeG.) and A. implicatus Vock. (Diptera: Culicidae) in a Colorado community - M. E. Smith (Mosquito News, 1965)

A preliminary study of Ranunculus inamoenus, alpeophilus and eschscholtzii - M. Porter (1965)

A study of the life cycles of Formica neorufabarbis and Formica fusca - M. Porter (1965)

The comparative myology of four dipodoid rodents (Genera Zapus, Napaeozapus, Sisista and Jaculus) - D. Klingener (University of Michigan Museum of Zoology, Miscellaneous Publication, 1964)

Social interaction among adults of the grasshopper Arphia conspersa - R. L. Willey (American Zoologist, 1964)

Experimental Analysis of the Homing Behavior of White Footed Mice (Genus Peromyscus) - K. S. Rawson; P. H. Hartline (1964)

Quantitative studies in angiosperm taxonomy. X. Valeriana. XI. Geranium. XII. Mimulus - N. H. Russell (Castanea, 1964)

A recreational use analysis of the National Forest land from Emerald Lake to the Rocky Mountain Biological Laboratory - R. Vaughan (1964)

A comparative hematological study of Peromyscus in Louisiana and Colorado - B. J. Gough; S. S. Kilgore (Journal of Mammalogy, 1964)
Peromyscus gossypinus and Peromyscus nuttalli were collected near Ruston, Louisiana from 1 September 1960 to 1 June 1961. Peromyscus maniculatus was collected near Gothic, Colorado from 1 August 1961 to 20 August 1961 and in the Black Canyon of the Gunnison National Monument from 23 August 1961 to 1 September 1961. Blood was taken from each animal collected and hematological measurements were made. Erythrocyte counts, hemoglobin concentrations and hematocrits were found to be higher for Peromyscus in Colorado than in Louisiana. Leukocyte counts, mean corpuscular volumes and mean corpuscular hemoglobins were higher for Peromyscus in Louisiana than in Colorado. Differences were also observed in the electrophoretic hemoglobin migration patterns between the species while mean corpuscular hemoglobin concentrations were similar in all species. Major hematological differences were found to occur between P. maniculatus at Gothic, Colorado and P. maniculatus at the Black Canyon, Colorado, and between P. gossypinus and P. nuttalli in Louisiana.

Axenic culture of two new species of branched Trichomyctes - R. W. Lichtwardt (American Journal of Botany, 1964)
Two new endocommensal fungi belonging to the Genistellaceae (Harpellales) were isolated in pure culture from the hindguts of Diptera larvae: Smittium culesitae from the mosquito Culesita impatiens, on a 10% brain‐heart infusion, and S. simulii from the black fly Simulium argus, on a potato dextrose‐yeast extract medium. Both species appear to have no unusual nutritional or cultural requirements and can grow on synthetic media and a variety of extract media, as can also the other 4 existent isolates of Smittium (Rubetella). Identical isolation methods proved unsuccessful for culturing various other genera of Harpellales and Eccrinales, with the exception of an Enterobryus sp. (from the fiddler crab Uca crenulata) which survived several generations before ceasing to grow. The genus Rubetella Tuzet & Manier is discarded in favor of Smittium Poisson, for reasons discussed.

The forest resource of Colorado / - Robert L. Miller; Grover A. Choate; Intermountain Forest and Range Experiment Station (Ogden, Utah) (1964)
This report is concerned primarily with the timber resource.However, because practically none of the forest area is managed for timber alone, the report also briefly describes demands for associated forest valueswater, recreation, wildlife, and forage.

Evidence for echolocation in shrews - E. Gould; N. C. Negus; A. Novick (Journal of Experimental Zoology, 1964)

An analysis of variation in Viola nephrophylla - N. H. Russell; F. S. Crosswhite (Madro¤o, 1963)

Cotton Rat from Kiowa County, Colorado - Roger Hansen (Journal of Mammalogy, 1963)
Journal Article Cotton Rat from Kiowa County, Colorado Get access R. M. Hansen R. M. Hansen Colorado State University Experiment Station, Fort Collins Search for other works by this author on: Oxford Academic Google Scholar Journal of Mammalogy, Volume 44, Issue 1, 20 February 1963, Page 126, https://doi.org/10.2307/1377190 Published: 20 February 1963 Article history Received: 23 February 1962 Published: 20 February 1963

The Colorado River Decision--1963 - Edward W. Clyde (Utah Law Review, 1963)

"Patterned ground" in south-western Colorado - K. Johnson (1963)

Range extension of Colorado Cyphoderris (Orthoptera: Prophalangopsidae) - R. L. Willey (Entomological News, 1963)

The passive dispersal of small aquatic organisms and their colonization of isolated bodies of water - B. Maguire (Ecological Monographs, 1963)
Little advantage was taken of what was possibly the greatest opportunity in modern times to observe the recolonization of an island, when much of the island was blown into the air and the remainder was covered by many feet of glowing volcanic ash.

A study of Plecoptera in Copper Creek, Gothic, Colorado - M. Walter (1963)

Geology of part of the southern Sangre de Cristo Mountains, New Mexico - Jennifer Miller; Angus W. Montgomery; P. Lorenz Sutherland (1963)
Precambrian metasedimentary and metaigneous rocks, Paleozoic sedimentary rocks, and Cenozoic sedimentary deposits and igneous rocks are exposed in the Tesuque-Velarde-Tres Ritos-Cowles thirty-minute quadrangle. The mapped area includes the main central and western parts of the southern Sangre de Cristo Mountains in north-central New Mexico and a part of the Rio Grande depression to the west. Precambrian rocks, mostly exposed in the highest ridges as well as the deepest canyons of the mountains, consist of the older, metasedimentary Ortega Formation and the younger, chiefly metaigneous Vadito Formation, both intruded by the Embudo Granite. The Ortega Formation includes a lower 10,000-foot-thick quartzite, overlain by staurolite schist and muscovite-quartz-biotite phyllite, with a distinctive black carbonaceous phyllite at the top. The Vadito Formation, unconformable on the Ortega, contains minor conglomerate near its base, metarhyolite felsites, and minor muscovite-quartz-biotite phyllite as well as higher, thick-bedded, hornblende-andesine amphibolites. Pegmatites, quartz veins, and widespread hydrothermal mineralization are related to the intrusion of the Embudo Granite into the Ortega and Vadito rocks, and postdate the dynamothermal metamorphism of these two formations. Weak metallic mineralization, mainly of copper, occurs widely and is related to the hydro-thermal metamorphism. The only major mine is the once-productive Pecos Mine near Tererro which yielded zinc, lead, and copper. The Precambrian rocks are isoclinally folded along general east-west-striking axes, with the axial planes dipping steeply southward and overturned to the north. Major divergences from this regional trend are the result of drag along the Picuris-Pecos fault and in part also may have been caused by injection of granite magma. Seven major folds were mapped in the Precambrian rocks. There has been a 23-mile, right-lateral, strike-slip separation of Precambrian units along the 53-mile-long north-south-trending Picuris-Pecos fault. This strike-slip faulting probably is Precambrian in age, but later episodes of vertical movement took place along the fault zone. Paleozoic strata crop out in the eastern half of the mapped area, unconformable upon the Precambrian rocks, and include the Del Padre Sandstone of undetermined age (0 to 750 feet thick); The Espiritu Santo Formation of undetermined age (0 to 55 feet thick); the Mississippian Tererro Formation (0 to 86 feet thick); the Pennsylvanian La Pasada, Flechado, and Alamitos formations (total thickness 2200 to 6500 feet); and the Sangre de Cristo Formation of Pennsylvanian and/or Permian age. The Del Padre and Espiritu Santo formations were deposited sometime during the interval from Cambrian to early Mississippian time. The Del Padre Sandstone is thickest east of the Picuris-Pecos fault near the Truchas Peaks area and thins away from that area primarily by lateral interfingering with the limestones of the Espiritu Santo Formation. The Tererro Formation of Meramecian age unconformably overlies the older units in most areas and is divided into three members, in ascending order: the Macho Member of limestone-boulder conglomerate, the Manuelitas Member of light-gray limestone and limestone pseudobreccia, and the Cowles Member of silty, cross-bedded limestone. The Pennsylvanian strata rest unconformably on all older rocks and show marked lateral changes in thickness and lithology from a thin shelf facies in the south (Pecos shelf) to a thick elastic trough facies in the north (Taos trough). In the south, the La Pasada Formation (1000 feet thick) consists of alternating limestone, shale, and thin sandstones, ranging from Morrowan to middle Desmoinesian in age, and is overlain conformably by the Alamitos Formation (1200 feet thick) which is characterized by arkosic sandstone, gray to red shale, and limestone. It ranges from late Desmoinesian to Virgilian in age and is overlain by arkosic sandstone and red shales of the Sangre de Cristo Formation, of Virgilian and/or Permian age in the Pecos area. North of Jicarilla Peak, the La Pasada Formation grades laterally into the Flechado Formation (2500 feet thick) which consists of sandstone and shale alternating with thin limestones. In the north, the Flechado is overlain by the Alamitos Formation (4000 feet thick), there made up of arkosic sandstone, conglomerate, and shale with limestone and siltstone in the upper part. The Alamitos Formation in the north is of upper Desmoinesian age and is overlain, apparently conformably, by the Sangre de Cristo Formation which is believed to be upper Pennsylvanian in age in that area and appears to grade southward into the upper part of the Alamitos Formation of the Pecos region. Pennsylvanian terrigenous sediments were derived primarily from the west and northwest, from the southern part of the Uncompahgre highland, and reflect two major periods of uplift of the west side of the Picuris-Pecos fault. The first period began in Morrowan time and provided a predominantly metasedimentary rock source; the second period began in late Desmoinesian time and, in addition, exposed feldspar-rich metaigneous rocks to erosion. Cenozoic deposits rest unconformably on various Paleozoic and Precambrian units in the western and northern parts of the mapped area. The Cenozoic units, in ascending order, are the Picuris Tuff, the Tesuque and Ancha formations of the Santa Fe Group, the Servilleta Formation (possibly equivalent to the Ancha Formation), glacial deposits, stream terraces, and floodplain alluvium. Present major structural features are related to Laramide deformation but were controlled in their development by Precambrian structures. Vertical dip-slip movement occurred along the Picuris-Pecos fault (believed to be part of a regional geofracture) during Laramide time with no rotation of the fault plane from the vertical attitude established during Precambrian time. Precambrian rocks on the west, upthrown side were brought in contact with Pennsylvanian rocks on the east. East of the Picuris-Pecos fault are a major south-plunging syncline and an eastward-adjacent anticline of Laramide age. These folds form the southern terminus of the Sangre de Cristo Mountains about ten miles south of the mapped area where their plunge carries the resistant Precambrian crystalline rocks beneath the surface.

The thoracic and basal abdominal musculature of the butterflies (Lepidoptera: Papilionoidea) - A. H. Ehrlich; A. H. Ehrlich (Microentomology, 1963)

Some metabolic and nutritive aspects of community structure with particular reference to the role of invertebrates in food chains, food webs, and trophic structure in marine, fresh-water, and terrestr - J. F. Feldman (1963)

The exclusion of Colpoda (Ciliata) from superficially favorable habitats - B. Maguire (Ecology, 1963)

Activity rhythm in Peromyscus: its influence on rates of recovery from Nembutal - S. T. Emlen; W. Kem (Science, 1963)

Vegetation and environmental patterns in the Crested Butte area, Gunnison County, Colorado - J. H. Langenheim (Ecological Monographs, 1962)

The head musculature of the butterflies (Lepidoptera: Papilionoidea) - A. H. Ehrlich; A. H. Ehrlich (Microentomology, 1962)

Beaver pond project - M. Stoerker; J. Pohly (1962)

The geology and petrography of the Parlin area, Gunnison County, Colorado - Don W. Dalrymple (Holmes Museum Of Anthropology (Wichita State University), 1962)
Thesis (M.S.)-- University of Wichita, College of Liberal Arts and Sciences, Dept. of Geology

The petrology and structural geology of the Tolvar Peak area, Gunnison County, Colorado - Carl Leach (Holmes Museum Of Anthropology (Wichita State University), 1962)
Thesis (M.S.)-- University of Wichita, College of Liberal Arts and Sciences, Dept. of Geology

Social behaviour of a colony of the yellow-bellied marmot (Marmota flaviventris) - Kenneth B. Armitage (Animal Behaviour, 1962)
It is postulated that agonistic behaviour is one of the factors that limits the number of marmots on a colony site.

Additional evidence of Rivoli's Hummingbird in Colorado - W. K. Baker; E. R. Blake (Auk, 1962)

PLANT TOXICANTS IN UNDERGROUND WATER IN ADAMS COUNTY, COLORADO - Erik K. Bonde; P. A. U. L. URONE (Soil Science, 1962)

The dichotomous action of Y chromosomes on the expression of position-effect variegation - W. K. Baker; A. Rein (Genetics, 1962)

Feeding Habits of Pocket Gophers on Mountain Grasslands, Black Mesa, Colorado - A. Lorin Ward; James O. Keith (Ecology, 1962)

Geophysical case history; Black Hollow field, Weld County, Colorado - E. J. Northwood (Geophysics, 1962)
Abstract The Black Hollow field is located in Weld County, Colorado, on the W. flank of the Denver-Cheyenne Basin. The producing reservoir is the Lyons Sandstone of Permian age. Seismic work was begun in the area in 1944, following up gravity leads resulting from a gravity survey done in 1943. A minor lead resulted, but it was not until 1949 when The California Co. moved in a Western Geophysical crew for additional seismic work that structural closure was recognized. This led to the drilling of a well to test the Lower Cretaceous Dakota and Lakota sands, which were then the major objective. The well was abandoned in 1952. During the next year, interest increased in Permian objectives and the well was re-entered and deepened to the Lyons, thereby becoming the discovery well at Black Hollow. Subsequent development drilling indicated anomalous thickening and stratigraphy on the W. flank which led to more seismic work. Results indicated that this could be mapped. Furthermore, a velocity gradient across the area was recognized, and applying this, the possibility of extending the field to the E. was recognized. More seismic work was done in an attempt to confirm this prior to additional drilling.

The Colorado River Basin - Neal D. Houghton (Western Political Quarterly, 1962)

Geology of Devonian Type Section (Chaffee Formation), Fremont County, Central Colorado - C. C. REEVES (Geological Society of America Bulletin, 1962)
Research Article| December 01, 1962 Geology of Devonian Type Section (Chaffee Formation), Fremont County, Central Colorado C. C REEVES, JR. C. C REEVES, JR. Dept. Geosciences, Texas Technological College, Lubbock, Texas Search for other works by this author on: GSW Google Scholar GSA Bulletin (1962) 73 (12): 1443–1450. https://doi.org/10.1130/0016-7606(1962)73[1443:GODTSC]2.0.CO;2 Article history received: 03 Oct 1960 first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation C. C REEVES; Geology of Devonian Type Section (Chaffee Formation), Fremont County, Central Colorado. GSA Bulletin 1962;; 73 (12): 1443–1450. doi: https://doi.org/10.1130/0016-7606(1962)73[1443:GODTSC]2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract Recent examination of the Chaffee Formation type section in western Fremont County, Colorado, has revealed several features of stratigraphic significance. The shallow Chaffee sea, encroaching over a surface eroded during Silurian time, produced the lower argillaceous zone of the basal Parting Member with its ripple marks, mud cracks, and thin-bedded silts. Deepening of the Chaffee sea is reflected by the sandstones or present-day quartzites of the upper Parting Member. The carbonates of the overlying Dyer Member represent the period of maximum Devonian inundation.Laboratory measurements of insoluble residue, magnetic and heavy-mineral fractions, and DTA curves for selected samples suggest that correlative zones within the Dyer Member of the Chaffee Formation may be recognizable on the basis of physical properties. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.

Patterns of vegetation of Meridian Lake - K. Johnson; E. Smith (1962)

Unusual Abundance of Peromyscus at Gothic, Colorado - Robert H. Catlett; R. Brown (Journal of Mammalogy, 1961)
Journal Article Unusual Abundance of Peromyscus at Gothic, Colorado Get access Robert H. Catlett, Robert H. Catlett Dept. of Zoology, Univ. of California, Davis Search for other works by this author on: Oxford Academic Google Scholar Robert Z. Brown Robert Z. Brown Dept. of Zoology, Colorado College, Colorado Springs Search for other works by this author on: Oxford Academic Google Scholar Journal of Mammalogy, Volume 42, Issue 3, 21 August 1961, Page 415, https://doi.org/10.2307/1377058 Published: 21 August 1961 Article history Received: 23 January 1961 Published: 21 August 1961

Notes on larval trematodes of Gunnison County, Colorado - G. W. Hunter; D. E. Birkenholz (Transactions of the American Microscopical Society, 1961)

Enteric microparasites of amphibians of the Elk Mountains, Colorado - E. Panitz (1961)

A brief history of the Rocky Mountain Biological Laboratory - J. C. Johnson (The Colorado Magazine, 1961)

An investigation of the ecology of Mertensia ciliata in Colorado - J. S. Pelton (Ecology, 1961)

Further records of mermithid parasites of mosquito larvae - M. E. Smith (Mosquito News, 1961)

Succession of species of protozoa in a last stage pond - G. Leland (1961)

The comparative morphology of the male reproductive system of the butterflies (Lepidoptera: Papilionoidea). I. Some nearctic species - A. H. Ehrlich; A. H. Ehrlich (Microentomology, 1961)

Foodplant of Hypaurotis chrysalus (Lycaenidae) in Colorado - C. L. Remington (Journal of the Lepidopterists' Society, 1960)

Interspecific hybridization and mimicry in butterflies - C. L. Remington (New Scientist, 1960)

Studies of schistosomiasis, XIII. Schistosome dermatitis in Colorado - G. W. Hunter (Journal of Parasitology, 1960)

The behavior of strong and weak centromeres at second anaphase of Drosophila melanogaster - M. Ptashne (Genetics, 1960)

Studies on the chromosomes of North American Rhopalocera. II. Hersperiidae, Megathymidae, and Pieridae - K. Maeki; C. L. Remington (Journal of the Lepidopterists' Society, 1960)

Notes on larval trematodes from snails of Gunnison County, Colorado - G. W. Hunter; D. E. Birkenholz (Journal of Parasitology (Supplement), 1960)

Studies on the chromosomes of North American Rhopalocera. I. Papilionidae - K. Maeki; C. L. Remington (Journal of the Lepidopterists' Society, 1960)

Vegetational succession in subalpine ponds in the Rockies - P. Buck (Proceedings of the Oklahoma Academy of Science, 1960)

Patterns of chromosome variability in Drosophila pseudoobscura - E. Terzaghi; D. Knapp (Evolution, 1960)

Wide experimental crosses between Papilio xuthus and other species - C. L. Remington (Journal of the Lepidopterists' Society, 1960)

Phytoplankton of Lakes of Grand Mesa, Colorado - L. W. Durrell; Claire Norton (Transactions of the American Microscopical Society, 1960)

Development of the Upper Colorado River - E. E. Larson (Journal AWWA, 1959)

Economics of forage production in the mountain meadow areas of Colorado : a progress report / - Elmer C. Hunter; Colorado Agricultural Experiment Station.; United States. (1959)
OO" 0% {67 O72 78 would be economical to harvest sufficient quantities of hay under the two-cut harvest system, along with one of the following:

Geology of the uranium deposits in the Cochetopa mining district, Saguache and Gunnison counties, Colorado - Roger C. Malan; Henry W. Ranspot (Economic Geology, 1959)
Vein-type uranium deposits of geologic interest and commercial significance occur in the Cochetopa mining district, Saguache and Gunnison Counties, Colorado. The uranium minerals in these deposits have been precipitated from hypogene solutions probably related to Tertiary igneous activity in the district. Silicification and brecciation of the sedimentary rocks in the Morrison formation and the Dakota sandstone, in and adjacent to fault zones, controlled deposition of uranium minerals from hydrothermal solutions. The most important deposits in the district are at the Gunnison Mining Company's Los Ochos claims where substantial reserves of ore in pipelike and in vertically tabular bodies have been blocked out. Pitchblende, the dominant uranium mineral, is associated with abundant clay and minor amounts of marcasite. As a result of studies carried out in the district, certain pertinent geologic criteria on ore localizing influences have been established. (auth)

SCHOOL SCREENING IN R-l JEFFERSON COUNTY. COLORADO???A BRIEF STATISTICAL REPORT - Otto J. Bcbbcr (Optometry and Vision Science, 1959)

Biological notes on Megathymus streckeri in Colorado - C. L. Remington (Lepidopterists' News, 1959)

Swimmer's Itch" in Colorado. A.S.B - G. W. Hunter (Bulletin, 1959)

A study of hybrids in Colias (Lepidoptera, Pieridae) - S. A. Ae (Evolution, 1959)

Variation patterns in four clones of Mertensia ciliata - J. S. Pelton (Madrono, 1959)

Comparative studies of the developmental rates, hibernation, and food plants in North American Colias (Lepidoptera, Pieridae) - S. A. Ae (American Midland Naturalist, 1958)
Shigeru Albert AE, Comparative Studies of Developmental Rates, Hibernation, and Food Plants in North American Colias (Lepidoptera, Pieridae), The American Midland Naturalist, Vol. 60, No. 1 (Jul., 1958), pp. 84-96

Report on grassland community and kettle holes - K. Gill (1958)

Report on beaver ponds - K. Gill (1958)

Report on the trip to Cumberland Pass - A. Ogura (1958)

Report on second Ecology field trip (Cumberland Pass) - H. Olney (1958)

The subalpine - J. Hassler (1958)

Genetics of populations of Lepidoptera - C. L. Remington; C. L. Remington (Proc X Int Congress Ent (Montreal), 1958)

Report on three series of beaver ponds in the Gothic area - J. Hassler (1958)

Brief report on the beaver pond series - A. Ogura (1958)

Combined reports to cover Englemann spruce forest, immature grassy slope, aspen woods, and sage community - H. Olney (1958)

Report on beaver activity in the Gothic area - H. Olney (1958)

Habitats in Copper Creek pool - J. Tollman (1958)

An ecological description of a close group of glacial-formed and snow-fed mountain lakes - P. Buck (1958)

Report on Gothic Reserve Area Aspen Community, Sage-Brush Community and an Open Slope - K. Gill (1958)

Semester report on sage communities - A. Ogura (1958)

Gothic Reserve - A. Ogura (1958)

The kettle ponds - J. Hassler (1958)

Growth responses of alpine Potentilla diversifolia and Achillea lanulosa to gibberellic acid - J. S. Pelton (Butler University Botanical Studies, 1958)

Report on fresh-water areas - L. Deutsch (1958)

Kettle ponds - H. Olney (1958)

Kettle ponds - A. Ogura; H. Olney (1958)

The Exploration of the Colorado River - G. J. Butland; J. E. Powell (The Geographical Journal, 1958)

Report on alpine tundra - J. Hassler (1958)

A comparative study in microhabitat - W. M. Shephard (1958)

Colorado River Aqueduct System of Southern California - Robert B. Diemer (Journal AWWA, 1958)

The Wilson Creek Field, Rio Blanco County, Colorado - J.B. Ladd (Journal of Petroleum Technology, 1957)
Abstract The Wilson Creek field is situated in mountainous terrain of Rio Blanco County, Colo. It was discovered in early 1938 and produces from both the Morrison and Sundance sands of Jurassic age. The underlying Sundance reservoir is fully developed with 18 wells; no dry holes have been drilled. The overlying Morrison reservoir of greater areal extent is almost completely developed with 21 producing wells and three dry holes around the periphery of the field; in addition, all or most of the 18 inside Sundance wells will eventually serve to exploit the central portion of the Morrison reservoir. The Morrison reservoir was moderately undersaturated with an initial average pressure of 2,180 psig and a bubble point pressure of about 1,100 psig; a partial water drive is in effect. A top structure gas injection program was started early in the life of the pool, resulting in a dampened pressure decline rate and increased oil recovery. The Sundance reservoir is greatly undersaturated and exhibits a prolific water drive. Individual well fluid capacities are generally high and edgewater-type encroachment is evident throughout all producing levels. A down-flank gas injection project has recently been instigated. The field is completely electrified and power is generated in a field plant. The operators own and maintain an 18-mile pipeline through which over 7,000 BOPD may be shipped by gravity flow. Major operational problems are related to extended winter periods of extreme cold and deep snow, rough terrain, paraffin accumulations, water disposal, and high water:oil and gas:oil ratio control. Introduction The Wilson Creek field is located on the northern edge of Rio Blanco County, Colo., about 25 miles southwest of Craig, the only railhead in the area, and 10 miles north of Meeker. For geographical orientation see Fig. 1. The local terrain is mountainous, being in the more rugged portion of the regional Danforth Hills anticlinical trend. It is readily accessible year-around via well-maintained county roads connecting the local federal and state highway system.

A classification of vegetation - H. L. Mason; J. H. Langenheim (Bulletin of the Ecological Society of America, 1957)

Archaeological Investigations on the Uncompahgre Plateau in West Central Colorado. H.M. Wormington and Robert H. Lister. Proceedings, No. 2, Denver Museum of Natural History Denver, 1956. xiv + 129 pp., 69 figs., 3 tables. $2.50. - John B. Rinaldo (American Antiquity, 1957)
Archaeological Investigations on the Uncompahgre Plateau in West Central Colorado. H.M. Wormington and Robert H. Lister. Proceedings, No. 2, Denver Museum of Natural History Denver, 1956. xiv + 129 pp., 69 figs., 3 tables. $2.50. - Volume 22 Issue 3

ARCHEOLOGY: Archeological Investigations on the Uncompahgre Plateau in West Central Colorado. H. M. Wormington and Robert H. Lister - J. H. Jennings (American Anthropologist, 1957)

APPRAISAL OF RIDGWAY AND GUNNISON “TILLITES,” SOUTHWESTERN COLORADO - FRANKLYN B. VAN HOUTEN (Geological Society of America Bulletin, 1957)
Research Article| March 01, 1957 APPRAISAL OF RIDGWAY AND GUNNISON "TILLITES," SOUTHWESTERN COLORADO FRANKLYN B VAN HOUTEN FRANKLYN B VAN HOUTEN PRINCETON UNIVERSITY, PRINCETON, N. J. Search for other works by this author on: GSW Google Scholar Author and Article Information FRANKLYN B VAN HOUTEN PRINCETON UNIVERSITY, PRINCETON, N. J. Publisher: Geological Society of America Received: 24 Oct 1956 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Copyright © 1957, The Geological Society of America, Inc. Copyright is not claimed on any material prepared by U.S. government employees within the scope of their employment. GSA Bulletin (1957) 68 (3): 383–388. https://doi.org/10.1130/0016-7606(1957)68[383:AORAGT]2.0.CO;2 Article history Received: 24 Oct 1956 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation FRANKLYN B VAN HOUTEN; APPRAISAL OF RIDGWAY AND GUNNISON "TILLITES," SOUTHWESTERN COLORADO. GSA Bulletin 1957;; 68 (3): 383–388. doi: https://doi.org/10.1130/0016-7606(1957)68[383:AORAGT]2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract No abstract available. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.

Jurassic stratigraphy in Elk Mountains, west-central Colorado - R. L. Langenheim (Bulletin of the American Association of Petroleum Geologists, 1957)

The systematics and evolution of Townsendia (Compositae) - J. H. Beaman (Harvard University, Gray Herbarium, Contributions, 1957)

Evidence of introgressive hybridization and mutation in certain Colorado populations of Aquilegia - J. S. Pelton (Proceedings of the Indiana Academy of Science, 1957)

Survey of the Gothic Natural Area - H. A. McCullough (The Scientific Monthly, 1956)

A study of seed dormancy in 18 species of high altitude Colorado plants - J. S. Pelton (Butler University Botanical Studies, 1956)

Archaeological investigations on the Uncompahgre Plateau in West Central Colorado - H. M. Wormington; Robert H. Lister (Medical Entomology and Zoology, 1956)

The Dipper of Copper Creek - J. L. George (1956)

Colorado Butterflies - F. M. Brown (1956)

Duttonite, New Vanadium Mineral from Peanut Mine, Montrose County, Colorado - Michael L. Thompson; Carl H. Roach; Robert Meyrowitz (Science, 1956)

Genetics of populations of Lepidoptera - C. L. Remington (Proceedings of the Tenth International Congress of Entomology, 1956)

Forecasting Summertime Shower Activity at Grand Junction, Colorado - Woodrow W. Dickey (Bulletin of the American Meteorological Society, 1956)
Due to the lack of a dense network of reporting stations in the Grand Junction, Colorado area and the inadequate representation of shower activity by observations of rain at a single rain gage, certain arbitrary criteria were set up to define a “shower” day at Grand Junction. Relationships of a number of meteorological variables to shower activity were determined and the four variables which showed the strongest relationships were combined graphically to form an objective forecast aid for determining the probability of shower activity at Grand Junction during the 18-hour period 1130MST to 0530MST. Tests on independent data confirm the relationship found in the developmental data.

The Rocky Mountain Biological Laboratory - W. H. Emig (AIBS Bulletin, 1956)
Journal Article The Rocky Mountain Biological Laboratory Get access W. H. Emig W. H. Emig Search for other works by this author on: Oxford Academic Google Scholar AIBS Bulletin, Volume 6, Issue 1, January 1956, Page 16, https://doi.org/10.2307/1292105 Published: 01 January 1956

Paragenesis and structure of pitchblende-bearing veins, Central City District, Gilpin County, Colorado - Paul Kibler Sims (Economic Geology, 1956)
Report discussing a study on the Central City district and adjoining mining areas to determine the geology and economic importance of the uranium occurrences in the region.