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Page 354, results 8826 - 8850

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Structure maps and seismic stratigraphy of the Yakataga segment of the continental margin, northern Gulf of Alaska
T.R. Bruns, W. C. Schwab
1983, Miscellaneous Field Studies Map 1424
Multichannel seismic-reflection data show the late Cenozoic structure, seismic stratigraphy, and geologic history of the Yakataga segment of the continental margin, between Icy Bay and Kayak Island, northern Gulf of Alaska. The structure of the Yakataga segment consists of broad folds and associated thrust faults beneath the continental shelf and...
Mineral resource potential map of the Spanish Peaks Wilderness Study Area, Huerfano and Las Animas counties, Colorado
Karin E. Budding, Steven E. Kluender
1983, Miscellaneous Field Studies Map 1542-C
A geologic and geochemical investigation and a survey of mines and prospects have been conducted to evaluate the mineral resource potential of the Spanish Peaks Wilderness Study Area, Huerfano and Las Animas Counties, in south-central Colorado. The·study area is underlain by sedimentary rocks of Paleozoic to Tertiary age (Johnson, 1969)....
Geochemical maps of the Selway-Bitterroot Wilderness, Idaho County, Idaho, and Missoula and Ravalli counties, Montana
Berton W. Coxe, Margo I. Toth
1983, Miscellaneous Field Studies Map 1495-C
The Selway-Bitterroot Wilderness covers almost 2,000 mi2 in east-central Idaho and western Montana (fig. 1). The wilderness lies across the Bitterroot Range, which forms the boundary between Idaho and Montana, and includes large portions of the drainages of the Selway, Lochsa, and Bitterroot Rivers. Elevations range from 1,800 ft on...
Aeromagnetic map and interpretation of geophysical data from the Condrey Mountain Roadless Area, Siskiyou County, California
R.C. Jachens, W.P. Elder
1983, Miscellaneous Field Studies Map 1540-B
The Condrey Mountain Roadless Area lies within the Klamath Mountains geologic province, a province composed of four eastward-dipping imbricate thrust slices or belts consisting predominantly of marine arc-related volcanic and sedimentary rocks, but also including significant amounts of ultramafic and other ophiolitic rocks (Irwin, 1981). From west to east the...
Mineral resource potential map of the Raywood Flat Roadless Areas, Riverside and San Bernardino counties, California
Jonathan C. Matti, Brett F. Cox, Stephen R. Iverson
1983, Miscellaneous Field Studies Map 1563-A
Geologic, geochemical, and geophysical studies within the Raywood "Flat Roadless Areas, together with an investigation of mines and prospects within the further planning area, resulted in (1) identification of nonmetallic mineral resources at a marble mine in the further planning area and (2) recognition of a small area in the...
Stratigraphy and paleontology of Mid-Cretaceous rocks in Minnesota and contiguous areas
William Aubrey Cobban, E.A. Merewether
1983, Professional Paper 1253
PART A: Molluscan fossils are locally abundant at outcrops of Upper Cretaceous rocks in eastern North and South Dakota, northeastern Nebraska, northwestern Iowa, and western and northern Minnesota. Other Cretaceous mollusks have been found in the glacial deposits in Minnesota, Iowa, and Illinois. The oldest well dated marine mollusks are...
Numerical simulation of ground-water flow in lower Satus Creek Basin, Yakima Indian Reservation, Washington
E. A. Prych
1983, Water-Resources Investigations Report 82-4065
A multilayer numerical model of steady-state ground-water flow in lower Satus Creek basin was constructed, calibrated using time-averaged data, and used to estimate the long-term effects of proposed irrigation-water management plans on ground-water levels in the area. Model computations showed that irrigation of new lands in the Satus uplands would...
Alteration and vein mineralization, Schwartzwalder uranium deposit, Front Range, Colorado
Alan R. Wallace
1983, Open-File Report 83-417
The Schwartzwalder uranium deposit, in the Front Range west of Denver, Colorado, is the largest vein-type uranium deposit in the United States. The deposit is situated in a steeply dipping fault system that cuts Proterozoic metamorphic rocks. The host rocks represent a submarine volcanic system with associated chert and iron-...
Comparative anatomy of epithermal precious- and base-metal districts hosted by volcanic rocks: A talk presented at the GAC/MSC/GGU Joint Annual Meeting, May 11-13, 1983, Victoria, British Columbia
Pamela Heald-Wetlaufer, Daniel O. Hayba, Nora K. Foley, J.A. Goss
1983, Open-File Report 83-710
In order to distinguish dissimilar from similar features of epithermal districts, lithotectonic, mineralogical and geochemical traits are compiled for 15 such districts. The districts occur in structurally complex settings associated with silicic to intermediate volcanics. Affiliation with subduction environments on a continental scale and caldera settings on a regional scale...
Hydrology of Area 1, eastern coal province, Pennsylvania [West Branch Susquehanna River, Sinnemahoning Creek, Upper Juniata River, Clearfield Creek]
William J. Herb, Deborah E. Brown, Lewis C. Shaw, Albert E. Becher
1983, Open-File Report 83-223
Provisions of the Surface Mining Control and Reclamation Act of 1977 recognized a nationwide need for hydrologic information in mined and potentially mined areas. This report is designed to be useful to mine owners, operators, regulatory authorities, citizens groups, and others by presenting information on existing hydrologic conditions and by...
General characteristics and availability of Landsat 3 and heat capacity mapping mission thermal infrared data
C. Scott Southworth
1983, Open-File Report 83-123
Two satellite systems launched by the National Aeronautics and Space Administration (NASA) in 1978 carried sensors which operated in the thermal infrared (IR) region of the electromagnetic spectrum, The final IR radiation data provide spectral information about the physical properties of the Earth's surficial materials not duplicated in either the...
Annual water-resources review, White Sands Missile Range, New Mexico, 1982
R. R. Cruz
1983, Open-File Report 83-695
Ground-water data were collected in 1982 at White Sands Missile Range in south-central New Mexico. Depth-to-water measurements in the Post Headquarters supply wells continued to show seasonal declines. Test wells east of the Headquarters well field continue to show long-term declines as well as seasonal fluctuations. The total amount of...
Regional magnetic and gravity features of the Gibson Dome area and surrounding region, Paradox Basin, Utah: A preliminary report
T.G. Hildenbrand, R.P. Kucks
1983, Open-File Report 83-359
Analyses of regional gravity and magnetic anomaly maps have been carried out to assist in the evaluation of the Gibson Dome area as a possible repository site for high-level radioactive waste. Derivative, wavelength-filtered, and trend maps were compiled to aid in properly locating major geophysical trends corresponding to faults, folds,...
Ground-water contamination at Wurtsmith Air Force Base, Michigan
J. R. Stark, T. R. Cummings, F. R. Twenter
1983, Water-Resources Investigations Report 83-4002
A sand and gravel aquifer of glacial origin underlies Wurtsmith Air Force Base in northeastern lower Michigan. The aquifer overlies a thick clay layer at an average depth of 65 feet. The water table is about 10 feet below land surface in the western part of the Base and about...
Petroleum geology and resources of southeastern Mexico, northern Guatemala, and Belize
James A. Peterson
1983, Circular 760
Petroleum deposits in southeastern Mexico and Guatemala occur in two main basinal provinces, the Gulf Coast Tertiary basin area, which includes the Reforma and offshore Campeche Mesozoic fields, and the Peten basin of eastern Chiapas State (Mexico) and Guatemala. Gas production is mainly from Tertiary sandstone reservoirs of Miocene age....
Ground-water resources in the Hood Basin, Oregon
Stephen J. Grady
1983, Water-Resources Investigations Report 81-1108
The Hood Basin, an area of 1,035 square miles in north-central Oregon, includes the drainage basins of all tributaries of the Columbia River between Eagle Creek and Fifteenmile Creek. The physical characteristics and climate of the basin are diverse. The Wasco subarea, in the eastern half of the basin, has...