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Page 3171, results 79251 - 79275

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Assessment of the alluvial sediments in the Big Thompson River Valley, Colorado
Adrienne Barnett, Karl J. Ellefsen
2000, Data Series 66
To obtain subsurface geologic information about the alluvium in the Big Thompson River valley, S-wave refraction data were collected along three roads that cross the valley. The refraction data were used to estimate velocities and thickness for a layered-earth model; from these models, three cross sections of the river valley...
Geologic map of the upper Parashant Canyon and vicinity Mohave County, northwestern Arizona
George H. Billingsley, Michelle L. Harr, Jessica L. Wellmeyer
2000, Miscellaneous Field Studies Map 2343
The geologic map of the upper Parashant Canyon area covers part of the Colorado Plateau and several large tributary canyons that make up the western part of Arizona's Grand Canyon. The map is part of a cooperative U.S. Geological Survey and National Park Service project to provide geologic information for...
Gold recycling; a materials flow study
Earle B. Amey
2000, Open-File Report 2000-195
This materials flow study includes a description of trends in consumption, loss, and recycling of gold-containing materials in the United States in 1998 in order to illustrate the extent to which gold is presently being recycled and to identify recycling trends. The quantity of gold recycled, as a percent of...
3-D image of urban areas and mountains of the northern Front Range, Colorado
N.S. Fishman, J.M. Evans, R.J. Olmstead, W. H. Langer
2000, IMAP 2750-A
Over the past 30 years, communities in the Northern Front Range of Colorado have experienced tremendous growth rivaling or surpassing that in other parts of the United States. This growth has challenged businesses as well as city, county, State, and Federal planners to meet the increasing demands for natural resources...
Stable hydrogen and oxygen isotope ratios for selected sites of the U.S. Geological Survey's NASQAN and benchmark surface-water networks
Tyler B. Coplen, Carol Kendall
2000, Open-File Report 2000-160
Increasingly, hydrologic studies require information on the isotopic composition of natural waters. This report presents stable hydrogen (delta2H) and oxygen isotope ratios (delta18O) from 391 selected sites of the U.S. Geological Survey's National Stream Quality Accounting Network (NASQAN) and BENCHMARK surface water networks collected during the years 1984-1987. Depth-integrated samples...
Water-quality assessment of the Eastern Iowa Basins: Hydrologic and biologic data, October 1996 through September 1998
Kimberlee K. Akers, Denise L. Montgomery, Daniel E. Christiansen, Mark E. Savoca, Douglas J. Schnoebelen, Kent Becher, Eric M. Sadorf
2000, Open-File Report 2000-67
Hydrologic and biologic data collected from October 1996 through September 1998 in the Eastern Iowa Basins study unit of the U.S. Geological Survey National Water-Quality Assessment Program are presented in this report. Monthly data collected from 12 sites on rivers and streams included measurements of physical properties and determinations of...
Magnetic susceptibilities of minerals
Sam Rosenblum, I. K. Brownfield
2000, Open-File Report 99-529
Magnetic separation of minerals is a topic that is seldom reported in the literature for two reasons. First, separation data generally are byproducts of other projects; and second, this study requires a large amount of patience and is unusually tedious. Indeed, we suspect that most minerals probably are never investigated...
Total petroleum systems of the Illizi Province, Algeria and Libya; Tanezzuft-Illizi
T. R. Klett
2000, Bulletin 2202-A
Undiscovered conventional oil and gas resources were assessed within a total petroleum system of the Illizi Province (2056) as part of the U.S. Geological Survey World Petroleum Assessment 2000. The Illizi Province is in eastern Algeria and a small portion of western Libya. The province and its total petroleum system...
U.S. talc; baby powder and much more
Water Resources Division, U.S. Geological Survey
2000, Fact Sheet 065-00
When most people think of talc, they probably envision talcum and baby powder. Since talc is very soft and easily carved, one might also think of sculptures in soapstone (massive talc). In fact, these uses of talc are quite minor compared to its wide variety of applications in manufacturing and...
Ground-water conditions in Georgia, 1999
Alan M. Cressler
2000, Open-File Report 2000-151
Ground-water conditions in Georgia during 1999 and for the period of record were evaluated using data from U.S. Geological Survey ground-water-level and ground-water-quality monitoring networks. Data for 1999 included in this report are from continuous water-level records from 130 wells and chloride analyses from 14 wells. Data from one well...
Simulation of aquifer tests and ground-water flowpaths at the local scale in fractured shales and sandstones of the Brunswick Group and Lockatong Formation, Lansdale, Montgomery County, Pennsylvania
Daniel J. Goode, Lisa A. Senior
2000, Open-File Report 2000-97
The U.S. Geological Survey, as part of technical assistance to the U.S. Environmental Protection Agency, has constructed and calibrated models of local-scale ground-water flow in and near Lansdale, Pa., where numerous sources of industrial contamination have been consolidated into the North Penn Area 6 Superfund Site. The local-scale models incorporate...