Geologic mapping, characterization of geologic structures, and sampling for geochronology was completed in two areas of the northwestern Sangre de Cristo Mountains from 2011 through 2017. This data release provides the raw analytical data, metadata and sample information for 20 zircon U-Pb age analy

This Laser ablation ICPMS U-Pb detrital zircon data set supports mapping and stratigraphic interpretations of the Upper Devonian Ignacio Formation in southwestern Colorado (Silverton area). All samples were collected from a measured stratigraphic section called "Sultan Creek South" located at 37.710

The study of plant secondary chemistry has been essential in understanding plant consumption by herbivores. There is growing evidence that secondary compounds also occur in floral rewards, including nectar and pollen. Many pollinators are generalist nectar and pollen foragers and thus are exposed to

SummaryAlthough secondary metabolites are prevalent in floral nectar, the ecological consequences for pollinators and pollination remain relatively unexplored. While often deterrent to pollinators at high concentrations, secondary metabolite concentrations in nectar tend to be much lower than second

In order to determine the degree of ecological damage inflicted as a result of mining operations around the Gothic area, three tailings piles were identified in Gothic and Crested Butte and an observational study of plant species on and around them carried out. It was found that both total numbers o

Specialization is common in most lineages of insect herbivores, one of the most diverse groups of organisms on earth. To address how and why specialization is maintained over evolutionary time, we hypothesized that plant defense and other ecological attributes of potential host plants would predict

Aeromagnetic and aeroradiometric data were collected along flight lines by instruments in an aircraft that recorded magnetic-field and radiometric values and locations. The magnetic data set presents latitude, longitude, altitude, and magnetic-field values. Geologic symbols or codes are also include

Aeromagnetic and aeroradiometric data were collected along flight lines by instruments in an aircraft that recorded magnetic-field and radiometric values and locations. The magnetic data set presents latitude, longitude, altitude, and magnetic-field values. Geologic symbols or codes are also include

Results from this study suggest that selenium contamination in parts of the upper basin of the Colorado River should be a major concern to recovery efforts for endangered fish.

US Department of Energy. 1992. Originally signed by: Paul L. Ziemer Ph.D

Environmental assessment (1978-1999). Covers Gunnison, Gunnison County, Colorado. Topics: remedial action, uranium mill tailings, groundwater contamination, water supply system. Agencies: U.S. Department of Energy, U.S. Environmental Protection Agency, U.S. Nuclear Regulatory Commission. Cites 8 ext

Technical report (October 1-31, 1992). Covers Gunnison, Colorado, Albuquerque. Topics: uranium mill tailings remedial action, decontamination, disposal cell, retention basin. Agencies: Department of Energy, Uranium Mill Tailings Remedial Action Project Office, MK-Ferguson.

Correspondence. Covers Gunnison, Colorado. Topics: remedial action, uranium mill tailings. Agencies: DOE, Uranium Mill Tailings Remedial Action Project Office.

Environmental assessment (1958-1992). Covers Gunnison, Colorado, Gunnison River. Topics: uranium mill tailings remedial action, disposal cell, vicinity properties, radiation exposure. Agencies: U.S. Department of Energy, DOE, Colorado Department of Health. Cites 11 external works.

Technical report (1991). Covers Colorado, United States, Washington, DC. Topics: radon measurement proficiency, radon gas, indoor radon measurement, radon measurement. Agencies: U.S. Environmental Protection Agency, EPA, Office of Radiation Programs. Cites 4 external works.

Environmental assessment. Covers Gunnison Uranium Mill Tailings Site, Gunnison, Gunnison River. Topics: remedial action, uranium mill tailings, hazardous waste management, ground-water protection. Agencies: Regional Administrator, Office of Management and Budget, Environmental Protection Agency. Cit

Environmental assessment (1945-1990). Covers Alabama, Gunnison, Landfill disposal site. Topics: tailings removal, hazardous waste management, ground-water protection, uranium and thorium byproduct materials. Agencies: Department of Energy, DOR, Council on Environmental Quality. Cites 57 external wor

Environmental assessment (June 1990). Covers Gunnison, Gunnison Landfill disposal site, Landfill disposal site. Topics: Water Resources Protection Strategy, uranium mill tailings, infiltration, disposal cell. Agencies: United States Department of Energy, U.S. Environmental Protection Agency, EPA. Ci

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 dis