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Drainage basins in Duval County, Florida
Roy B. Stone, Joseph B. Largen
1983, Water-Resources Investigations Report 82-4069
The drainage basins and subbasins in Duval County, Florida, are delineated on this atlas map. The county 's 840 square-mile area is drained by three major river systems; the St. Johns, 668 square miles; Nassau, 113 square miles; and St. Marys, 59 square miles. The remainder of the county is...
Selective annotated bibliography of ground-water resources, records of wells and springs, and availability of streamflow data on Indian reservations in Montana
Gary W. Levings, Melvin K. White
1983, Open-File Report 83-129
A compilation was made, for each of the seven Indian reservations in Montana, of the availability of hydrologic data. The report consists of an annotated bibliography of ground-water resources reports, selected data for wells and springs from the data bases of the U.S. Geological Survey and Montana Bureau of Mines...
Data compilation of benthic invertebrates from tributary streams in Yampa and North Platte River Basins, northwestern Colorado
L. J. Britton
1983, Open-File Report 83-140
Benthic invertebrates were collected from Trout Creek, Fish Creek, and the Williams Fork (tributaries of the Yampa River in Routt and Moffat Counties), and Little Grizzly and Grizzly Creeks (tributaries of the North Platte River in Jackson County). Stream-sampling sites were upstream and downstream from potential, existing, or historical coal-mining...
Comparison of the chemical characteristics of the uranium deposits of the Morrison Formation in the Grants uranium region, New Mexico
C.S. Spirakis, C. T. Pierson
1983, Open-File Report 83-380
Statistical treatment of the chemical data of samples from the northeast Church Rock area, Ruby deposit, Mariano Lake deposit, and the Ambrosia Lake district indicates that primary ore-forming processes concentrated copper, iron, magnesium, manganese, molybdenum, selenium, vanadium, yttrium, arsenic, organic carbon, and sulfur, along with uranium. A barium halo that...
Electrical and magnetic properties of rock and soil
J. H. Scott
1983, Open-File Report 83-915
Field and laboratory measurements have been made to determine the electrical conductivity, dielectric constant, and magnetic permeability of rock and soil in areas of interest in studies of electromagnetic pulse propagation. Conductivity is determined by making field measurements of apparent resisitivity at very low frequencies (0-20 cps), and interpreting the...
Ground water in the northern part of Clackamas County, Oregon
A.R. Leonard, C. A. Collins
1983, Open-File Report 80-1049
Northern Clackamas County is part of the rapidly growing Portland metropolitan area. Population of this 250-square-mile area increased about 50 percent between 1970 and 1976. The study area includes a small segment of the Willamette River alluvial valley near Canby, and extends northward to the Clackamas River and eastward to...
A surface vitrinite reflectance anomaly related to Bell Creek oil field, Montana, U.S.A.
C.E. Barker, M.C. Dalziel, M. J. Pawlewicz
1983, Open-File Report 83-826
Vitrinite reflectance measurements from surface samples of mudrock and coal show anomalously high values over the Bell Creek oil field. The average vitrinite reflectance (Rm) increases to a maximum of 0.9 percent over the field against background values of about 0.3 percent. The Rm anomaly coincides with a geochemical anomaly...
Vegetation and climates of the last 45,000 years in the vicinity of the Nevada Test Site, south-central Nevada
W. G. Spaulding
1983, Open-File Report 83-535
Paleoclimatic reconstructions for the Nevada Test Site, spanning the last 45,000 years, are based on plant macrofossil assemblages from radiocarbonated packrat (Neotoma spp) middens from south-central Nevada. The temperature regime during the Wisconsin glacial age, from before about 45,000 years ago until about 12,000 years ago, was characterized by lower...