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Page 274, results 6826 - 6850

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Water-level altitudes 1999, water-level changes 1977-99 and 1998-99, and compaction 1973-98 in the Chicot and Evangeline aquifers: Houston-Galveston region, Texas
L.S. Coplin, H. X. Santos, J. W. East
1999, Open-File Report 99-178
This report is one in an annual series of reports that depicts water-level altitudes and water-level changes since 1977 and compaction since 1973 in the Chicot and Evangeline aquifers in the Houston-Galveston region, Texas. The report, prepared in cooperation with the City of Houston and the Harris-Galveston Coastal Subsidence District,...
Physical, chemical, and isotopic data for samples from the Anderson Springs area, Lake County, California, 1998-1999
C. J. Janik, F. Goff, M.L. Sorey, J. J. Rytuba, D. Counce, E.M. Colvard, M. Huebner, L. D. White, A. Foster
1999, Open-File Report 99-585
Anderson Springs is located about 90 miles (145 kilometers) north of San Francisco, California, in the southwestern part of Lake County. The area was first developed in the late 1800s as a health resort, which was active until the 1930s. In the rugged hills to the south of the resort...
Lithostratigraphy, geophysics, biostratigraphy, and strontium-isotope stratigraphy of the surficial aquifer system of eastern Collier County and northern Monroe County, Florida
S.D. Weedman, Frederick L. Paillet, Lucy E. Edwards, K. R. Simmons, T.M. Scott, B. R. Wardlaw, R.S. Reese, J. L. Blair
1999, Open-File Report 99-432
In 1997, ten cores were drilled in eastern Collier County and northern Monroe County, within the limits of the Big Cypress National Preserve. These cores represent a continuation of the study of seven cores in western Collier County begun in 1996 and reported in Weedman and others (1997) and Edwards...
Ground-water occurrence and contribution to streamflow, northeast Maui, Hawaii
Stephen B. Gingerich
1999, Water-Resources Investigations Report 99-4090
The study area lies on the northern flank of theEast Maui Volcano (Haleakala) and covers about129 square miles between the drainage basins ofMaliko Gulch to the west and Makapipi Stream tothe east. About 989 million gallons per day of rain-fall and 176 million gallons per day of fog dripreaches the...
Geologic map of the Sedan quadangle, Gallatin and Park Counties, Montana
Betty Skipp, D. R. Lageson, W. J. McMannis
1999, IMAP 2634
This quadrangle lies 6.4 km (4 mi) northeast of Bozeman, Mont., in southwestern Montana. Metamorphic, sedimentary, and volcanic rocks of Precambrian to Tertiary age are exposed in the Bridger Range and southwestern margin of the Crazy Mountains Basin in a crustal cross section and a structural triangle zone....
Analytical results for 35 mine-waste tailings cores and six bed sediment samples, and an estimate of the volume of contaminated materials at Buckeye meadow on upper Basin Creek, northern Jefferson County, Montana
David L. Fey, Stan E. Church, Christopher J. Finney
1999, Open-File Report 99-537
Metal-mining related wastes in the Boulder River basin study area in northern Jefferson County, Montana have been implicated in their detrimental effects on water quality with regard to acid-generation and toxic-metal solubilization. Flotation-mill tailings in the meadow below the Buckeye mine, hereafter referred to as the Buckeye mill-tailings site, have...
Geographic information systems (GIS) compilation of geophysical, geologic, and tectonic data for the circum-North Pacific
Mark L. Greninger, Simon L. Klemperer, Warren J. Nokleberg
1999, Open-File Report 99-422
The accompanying directory structure contains a Geographic Information Systems (GIS) compilation of geophysical, geological, and tectonic data for the Circum-North Pacific. This area includes the Russian Far East, Alaska, the Canadian Cordillera, linking continental shelves, and adjacent oceans. This GIS compilation extends from 120°E to 115°W, and from 40°N to...
Stream and aquifer biology of south-central Texas — A literature review, 1973-97
Robert T. Ourso, C. E. Hornig
1999, Open-File Report 99-243
This report summarizes in table format 32 aquatic vertebrate (primarily fish), 54 aquatic invertebrate, and 13 aquatic plant studies available for the area of the South-Central Texas study unit of the U.S. Geological Survey National Water-Quality Assessment. The studies, published mostly during 1973–97, pertain to the Guadalupe, San Antonio, and...
Volcano hazards in the Mount Jefferson region, Oregon
Joseph S. Walder, Cynthia A. Gardner, Richard M. Conrey, Bruce J. Fisher, Steven P. Schilling
1999, Open-File Report 99-24
Mount Jefferson is a prominent feature of the landscape seen from highways east and west of the Cascades. Mount Jefferson (one of thirteen major volcanic centers in the Cascade Range) has erupted repeatedly for hundreds of thousands of years, with its last eruptive episode during the last major glaciation which...
Magmatic carbon dioxide emissions at Mammoth Mountain, California
Christopher D. Farrar, John M. Neil, James F. Howle
1999, Water-Resources Investigations Report 98-4217
Carbon dioxide (CO2) of magmatic origin is seeping out of the ground in unusual quantities at several locations around the flanks of Mammoth Mountain, a dormant volcano in Eastern California. The most recent volcanic activity on Mammoth Mountain was steam eruptions about 600 years ago, but seismic swarms and long-period...
Soil-calcium depletion linked to acid rain and forest growth in the eastern United States
Gregory B. Lawrence, T.G. Huntington
1999, Water-Resources Investigations Report 98-4267
Since the discovery of acid rain in the 1970's, scientists have been concerned that deposition of acids could cause depletion of calcium in forest soils. Research in the 1980's showed that the amount of calcium in forest soils is controlled by several factors that are difficult to measure. Further research...
Floods of June 28-29, 1998 in Ohio
G. F. Koltun
1999, Water-Resources Investigations Report 99-4192
During a 96-hour period extending from June 26 to June 30, 1998, a stalled frontal system produced a series of storms that dumped 10 inches or more of rain on parts of Ohio. The storms occurred at the end of a relatively wet month, resulting in flooding and widespread damage...
Plutons and accretionary episodes of the Klamath Mountains, California and Oregon
William P. Irwin, Joseph L. Wooden
1999, Open-File Report 99-374
The Klamath Mountains consist of various accreted terranes and include many plutons that range in composition from gabbro to granodiorite. Some of the plutons (preaccretionary plutons) were parts of terranes before the terranes accreted; others (accretionary plutons) intruded during or after the accretion of their host terrane(s). This report attempts...
The Midwestern Basins and Arches regional aquifer system in parts of Indiana, Ohio, Michigan, and Illinois — Summary
Edward F. Bugliosi
1999, Professional Paper 1423-A
The Midwestern Basins and Arches aquifer system is composed of surficial deposits of Pleistocene and Holocene age and of Silurian and Devonian age carbonate rock in parts of Indiana, Illinois, Michigan, and Ohio. The study area encompasses a complex of structural arches--the Cincinnati, Findlay, and Kankakee arches--and it is bounded...
Geometry, structure, and concealed lithology of the San Rafael Basin, southeastern Arizona
Mark W. Bultman
1999, Open-File Report 99-399
The contiguous United States has been well explored for exposed conventional mineral deposits. Therefore, it is likely that many economically viable and strategically significant conventional undiscovered mineral deposits will be found in bedrock concealed beneath basin sediments. Mineral resource assessments must incorporate an understanding of the geometry, structure, and concealed...
Evaluation of weights of evidence to predict epithermal-gold deposits in the Great Basin of the western United States
Gary L. Raines
1999, Natural Resources Research (8) 257-276
The weights-of-evidence method provides a simple approach to the integration of diverse geologic information. The application addressed is to construct a model that predicts the locations of epithermal-gold mineral deposits in the Great Basin of the western United States. Weights of evidence is a data-driven method requiring known deposits and...
Cruise report; RV Coastal Surveyor Cruise C1-99; multibeam mapping of the Long Beach, California continental shelf; April 12 through May 19, 1999
James V. Gardner, John E. Hughes Clarke, Larry A. Mayer
1999, Open-File Report 99-360
The greater Los Angeles area of California is home to more than 10 million people. This large population puts increased pressure on the adjacent offshore continental shelf and margin with activities such as ocean disposal for dredged spoils, explosive disposal, waste-water outfall, and commercial fishing. The increased utilization of the...
Tertiary coals in South Texas: Anomalous cannel-like coals of Webb County (Claiborne Group, Eocene) and lignites of Atascosa County (Jackson Group, Eocene) - Geologic setting, character, source-rock and coal-bed methane potential
Peter D. Warwick, Claire E. Aubourg, Jason C. Willett, editor(s)
1999, Open-File Report 99-301
The coal-bearing Gulf of Mexico Coastal Plain of North America contains a variety of depositional settings and coal types. The coal-bearing region extends westward from Alabama and Mississippi, across Louisiana to the northern part of the Mississippi Embayment, and then southward to eastern Arkansas, Texas and northern Mexico (fig. 1)....
Geochemistry of stream-sediment samples from the Santa Renia Fields and Beaver Peak quadrangles, northern Carlin Trend, Nevada
Ted G. Theodore, Boris B. Kotlyar, Vladimir I. Berger, Barry C. Moring, Donald A. Singer, Sven A. Edstrom
1999, Open-File Report 99-341
A broad west-to-east increase of many metal concentrations has been found in stream sediments during a reconnaissance investigation conducted in conjunction with geologic studies in the Santa Renia Fields and Beaver Peak 7–1/2 minute quadrangles near the northern end of the Carlin trend of gold deposits in the Tuscarora Mountains....