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Page 5078, results 126926 - 126950

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Not all publications have extents, not all extents are completely accurate
Abundance and distribution of thorium in the carbonatite stock at Iron Hill, Powderhorn District, Gunnison County, Colorado
Theodore J. Armbrustmacher
1979, Open-File Report 79-536
The carbonatite stock at Iron Hill is part of an alkalic complex of Cambrian or latest Precambrian age containing pyroxenite, uncompahgrite, ijolite, nepheline syenite, and related rocks characterized by their subsilicic composition and by their lack of calcic plagioclase. Thorium averages 36.2 parts per million (ppm) Th (0.0041 percent Th02)...
System dynamics simulation modeling applied to western coal development environmental impact analysis
R. K. Mark, D. S. Harwood, E. B. Newman, Richard R. Doell
1979, Open-File Report 79-226
This report, which was originally prepared in 1977 as an administrative report, evaluates the Geological Survey's first attempt to use simulation modeling in the environmental impact statement (EIS) process. It discusses the background of the modeling project, evaluates the usefulness of that project to the Northern Powder River Basin regional...
Grain size, mineralogy, carbon/carbonate content, and age of Miocene and Pliocene samples from dredge hauls, DSDP holes 184B and 185, and the Sandy River Well, southern Bering Sea continental margin and Alaska Peninsula
Michael B. Underwood, T.L. Vallier, J.V. Gardner, J.A. Barron
1979, Open-File Report 79-450
A jointly supported program between the Bureau of Land Management and the U. S. Geological Survey, Pacific-Arctic Branch of Marine Geology was undertaken in the Southern Bering Sea with funds managed by the Outer Continental Shelf Environmental Assessment Program (OCSEAP) Office. This report provides data from analyses that were performed...
Arsenic, nitrate, iron, and hardness in ground water, Fairbanks area, Alaska
Paula R. Johnson, D.E. Wilcox, W.D. Morgan, Josephine Merto, Ruth McFadden
1979, Open-File Report 78-1034
Well water with concentrations of arsenic and nitrate exceeding U.S. Environmental Protection Agency standards occurs sporadically throughout the hills north of Fairbanks, Alaska. The arsenic contamination has not been correlated with placer or other mining activity. The high levels of nitrate do not generally appear related to septic waste contamination....
Summary report of the sediments, structural framework, petroleum potential, and environmental conditions of the United States Mid-Atlantic continental margin in area of proposed Oil & Gas Lease Sale No. 59
John Stevens Schlee, Robert E. Mattick, Richard B. Powers, James M. Robb, David C. Twichell, Bradford Butman
1979, Open-File Report 79-1351
This report has been compiled to update and summarize the geological information concerning the area of the Atlantic continental margin off the U.S. Mid-Atlantic proposed for Oil and Gas Lease Sale No. 59 (fig. 1). The region of interest lies between 35° and 41° N and 70.5° and 76° W....
Helium in soil-gas and helium/radon in ground water in the vicinity of a south Texas uranium roll-type deposit
G. Michael Reimer, C.G. Bowles, D.G. Murrey, J.M. Been
1979, Open-File Report 79-1625
A survey was run in the vicinity of a south Texas uranium roll-type deposit to determine the general concentration of helium in the soil gas and helium/radon ratios in the ground water for deposits of this nature. The helium in soil-gas concentrations are typical of the concentrations found associated with...
Approximate altitude of water levels in wells in the Chicot and Evangeline aquifers in the Houston area, Texas, Spring 1977 and Spring 1978
R.K. Gabrysch
1979, Open-File Report 79-334
The purpose of this report, which was prepared in cooperation with the cities of Houston and Galveston, the Harris-Galveston Coastal Subsidence District, and the Texas Department of Water Resources, is to show the altitudes of water levels in wells in the Chicot and Evangeline aquifers in the Houston, Texas, metropolitan...
Hexavalent chromium in the ground and surface waters near Telluride, Colorado; preliminary data report
David B. Grove, Ronald L. Miller, Leonard F. Konikow, P. S. O’Boyle
1979, Open-File Report 79-700
Data showing results of 38 groundwater and 25 surface-water samples analyzed for hexavalent chromium are presented. Most samples were taken within the Telluride, Colo., city limits during October 1978. Twenty-four of the 38 groundwater samples (63%) contained more than 50 micrograms per liter of hexavalent chromium. Excluding the mill tailings...