Gravity and magnetic study of the Pahute Mesa and Oasis Valley region, Nye County, Nevada
Edward A. Mankinen, Thomas G. Hildenbrand, Gary L. Dixon, Edwin H. McKee, Christopher J. Fridrich, Randell J. Laczniak
1999, Open-File Report 99-303
Regional gravity and aeromagnetic maps reveal the existence of deep basins underlying much of the southwestern Nevada volcanic field, approximately 150 km northwest of Las Vegas. These maps also indicate the presence of prominent features (geophysical lineaments) within and beneath the basin fill. Detailed gravity surveys were conducted in order...
Data on the crystal growth of calcite from calcium bicarbonate solutions at 34 degrees C and CO2 partial pressures of 0.101, 0.0156 and 0.00102 atmospheres
Niel Plummer, Eurybiades Busenberg
1999, Open-File Report 99-247
No abstract available....
Geological and geophysical setting of the gold-silver vein systems of Unga Island, southwestern Alaska
James R. Riehle, editor(s)
1999, Open-File Report 99-136
The topic of this CD-ROM is the geologic framework of gold-silver vein deposits on Unga Island, in the Shumagin Islands, southwestern Alaska. The core of the publication is a new geologic map at a scale of 1:63,360 and aeromagnetic and electromagnetic survey data acquired by industry over the area of...
Summary of suspended-solids concentration data, San Francisco Bay, California, water year 1997
Paul A. Buchanan, David H. Schoellhamer
1999, Open-File Report 99-189
A plan for assessing the occurrence and distribution of methyl tert-butyl ether and other volatile organic compounds in drinking water and ambient ground water in the Northeast and Mid-Atlantic regions of the United States
Stephen J. Grady, George D. Casey
1999, Open-File Report 99-207
A plan to assess the occurrence and distribution of methyl tert-butyl ether (MTBE) and other volatile organic compounds (VOCs) in drinking water and ambient ground water in the Northeast and Mid-Atlantic regions of the United States was designed to meet two primary objectives. This study will provide the U.S. Environmental...
Summary of ground-water data for Tutuila and Aunuu, American Samoa, for October 1987 through September 1997
Scot K. Izuka
1999, Open-File Report 99-252
Ground-water and rainfall data for the period October 1987 through September 1997 from Tutuila and Aunuu, American Samoa, are plotted in time-series graphs and summarized. The data include pumpage and chloride concentrations from 53 production wells on Tutuila, including 5 new wells that were put into production between October 1996...
Hydrologic and water-quality data for surface water, ground water, and springs in north-central Park County, Colorado, April 1997–November 1998
B. W. Bruce, R. A. Kimbrough
1999, Open-File Report 99-183
No abstract available....
New reporting procedures based on long-term method detection levels and some considerations for interpretations of water-quality data provided by the U.S. Geological Survey National Water Quality Laboratory
Carolyn J. Oblinger Childress, William T. Foreman, Brooke F. Connor, Thomas J. Maloney
1999, Open-File Report 99-193
This report describes the U.S. Geological Survey National Water Quality Laboratory's approach for determining long-term method detection levels and establishing reporting levels, details relevant new reporting conventions, and provides preliminary guidance on interpreting data reported with the new conventions. At the long-term method detection level concentration, the risk of a...
Water-quality and bottom-sediment-chemistry data for Left Hand Valley Reservoir, Boulder County, Colorado, January-August 1998
R. A. Kimbrough
1999, Open-File Report 99-192
No abstract available....
Subduction zone and crustal dynamics of western Washington; a tectonic model for earthquake hazards evaluation
Dal Stanley, Antonio H. Villasenor, Harley Benz
1999, Open-File Report 99-311
The Cascadia subduction zone is extremely complex in the western Washington region, involving local deformation of the subducting Juan de Fuca plate and complicated block structures in the crust. It has been postulated that the Cascadia subduction zone could be the source for a large thrust earthquake, possibly as large...
Thickness of Cenozoic Deposits of Yucca Flat Inferred from Gravity Data, Nevada Test Site, Nevada
G. A. Phelps, V.E. Langenheim, R.C. Jachens
1999, Open-File Report 99-310
The basin-basement contact for Yucca Flat was modeled using isostatic gravity data, a linear density-depth function for the basin deposits, and drill-hole constraints to produce a digital database of both the depth to basement and the gravitational anomaly associated with the basement rocks. The model predicts a depth of roughly...
Gas and Isotope Geochemistry of 81 Steam Samples from Wells in The Geysers Geothermal Field, Sonoma and Lake Counties, California
Jacob B. Lowenstern, Cathy J. Janik, Lynne Fahlquist, Linda S. Johnson
1999, Open-File Report 99-304
The Geysers geothermal field in northern California, with about 2000-MW electrical capacity, is the largest geothermal field in the world. Despite its importance as a resource and as an example of a vapor-dominated reservoir, very few complete geochemical analyses of the steam have been published (Allen and Day, 1927; Truesdell and others, 1987). This report presents...
Stream channel cross sections for a reach of the Boise River in Ada County, Idaho
Jon Hortness, Douglas C. Werner
1999, Open-File Report 99-211
The Federal Emergency Management Agency produces maps of areas that are likely to be inundated during major floods, usually the 100-year, or 1-percent probability, flood. The maps, called Flood Insurance Rate Maps, are used to determine flood insurance rates for homes, businesses, or other structures located in flood-prone areas. State...
Archive of seismic-reflection data collected aboard RV CORLISS cruise CRLS98014 in the Columbia River estuary, Willapa Bay, and off southern Washington inner continental shelf
V.A. Cross, D.C. Twichell, K. F. Parolski
1999, Open-File Report 99-307
Water quality and discharge data for St. Joseph Bay, Florida, 1997-98
M. P. Berndt, M.A. Franklin
1999, Open-File Report 99-190
Historical data were compiled on water quality and water levels for the St. Joseph Bay area to assess quality of possible sources of land-derived water into the Bay. Ground-water quality data were compiled from Florida Department of Environmental Protection and surface-water quality data were compiled from U.S.Geological Survey files. Water-quality...
Publications of the Western Geologic Mapping Team 1997-1998
Paul Stone, C.L. Powell II
1999, Open-File Report 99-302
The Western Geologic Mapping Team (WGMT) of the U.S. Geological Survey, Geologic Division (USGS, GD), conducts geologic mapping and related topical earth-science studies in the western United States. This work is focused on areas where modern geologic maps and associated earth-science data are needed to address key societal and environmental...
Water quality and habitat conditions in upper Midwest streams relative to riparian vegetation and soil characteristics, August 1997 : study design, methods, and data
S. K. Sorenson, S. D. Porter, K.B. Akers, M.A. Harris, S. J. Kalkhoff, K. E. Lee, L. Roberts, P. J. Terrio
1999, Open-File Report 99-202
Water-chemistry, biological, and habitat data were collected from 70 sites on Midwestern streams during August 1997 as part of an integrated, regional water-quality assessment by the U.S. Geological Survey National Water-Quality Assessment (NAWQA) Program. The study area includes the Corn Belt region of southern Minnesota, eastern Iowa, and west-central Illinois,...
Ground-water conditions in Georgia, 1998
Alan M. Cressler
1999, Open-File Report 99-204
Ground-water conditions in Georgia during 1998 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 1998 included in this report are from continuous water-level records from 130 wells and chloride analyses from 14 wells. Data from one well...
Plan of study to define hydrogeologic characteristics of the Madera Limestone in the east mountain area of central New Mexico
D.R. Rankin
1999, Open-File Report 99-201
The east mountain area of central New Mexico includes the eastern one-third of Bernalillo County and portions of Sandoval, Santa Fe, and Torrance Counties. The area covers about 320 square miles. The Madera Limestone, the principal aquifer in the east mountain area, is the sole source of water for domestic, municipal,...
Alaska resource data file: Prince Rupert quadrangle
H. C. Berg
1999, Open-File Report 99-306
No abstract available....
U.S. Geological Survey programs in Florida, 1999
Water Resources Division, U.S. Geological Survey
1999, Open-File Report 99-196
The safety, health, and economic well-being of Florida?s citizens are important to the U.S. Geological Survey (USGS), which is involved in water-related, geologic, biological, land use, and mapping issues in many parts of the State. The USGS office in Tallahassee acts as the liaison for all studies conducted by USGS...
Nomenclature of the micas
M. Rieder, G Cavazzini, Y.S. D’yakonov, V.A. Frank-Kamenetskii, G Gottardi, S. Guggenheim, P.V. Koval, G Muller, A.M.R. Neiva, E.W. Radoslovich, J.-L. Robert, F.P Sassi, H. Takeda, David R. Wones
1999, Mineralogical Magazine (63) 267-279
End-members and species defined with permissible ranges of composition are presented for the true micas, the brittle micas, and the interlayer-deficient micas. The determination of the crystallochemical formula for different available chemical data is outlined, and a system of modifiers and suffixes is given to allow the expression of unusual...
Effects of sample size and sampling frequency on studies of brown bear home ranges and habitat use
Steve M. Arthur, Charles C. Schwartz
1999, Ursus (11) 139-148
We equipped 9 brown bears (Ursus arctos) on the Kenai Peninsula, Alaska, with collars containing both conventional very-high-frequency (VHF) transmitters and global positioning system (GPS) receivers programmed to determine an animal's position at 5.75-hr intervals. We calculated minimum convex polygon (MCP) and fixed and adaptive kernel home ranges for randomly-selected...
The Washington and Oregon mid-shelf silt deposit and its relation to the late Holocene Columbia River sediment budget
Stephen C. Wolf, Hans Nelson, Michael R. Hamer, Gita Dunhill, R. Lawrence Phillips
1999, Open-File Report 99-173
The purpose of this report is to compile and analyze existing data which lend support to the development of a sediment budget for the Columbia River, coastal, and offshore regions of southwest Washington. This will contribute to the construction of a sediment budget model which will reflect sediment sources, depocenters,...
Last interglacial sea-surface temperature estimates from the California margin; improvements to the modern analog technique
Harry J. Dowsett, Richard Z. Poore
1999, Bulletin 2171
Total faunal analyses of planktic foraminifer assemblages are used to derive sea surface temperature estimates for the last interglacial from Ocean Drilling Program Sites 1018 and 1020 off northern and central California. Foraminifer assemblage data were transformed to sea-surface temperature (SST) estimates by using the modern analog technique (MAT). In...
