Heavy-mineral distribution in modern and ancient bay deposits, Willapa Bay, Washington, U.S.A.
Gretchen Luepke, H. Edward Clifton
1983, Sedimentary Geology (35) 233-247
Analysis of heavy-mineral distribution in modern sediments of Willapa Bay, Washington, indicates a dominance of two mineralogic assemblages, one with approximately equivalent amounts of hornblende, orthopyroxene and clinopyroxene, the other dominated by clinopyroxene. The hornblende-orthopyroxene-clinopyroxene suite is derived from the Columbia River, which discharges into the ocean a short distance...
Ichnofossils of the alluvial Willwood Formation (lower Eocene), Bighorn Basin, northwest Wyoming, U.S.A
T. M. Bown, M. J. Kraus
1983, Palaeogeography, Palaeoclimatology, Palaeoecology (43) 95-128
The ichnofossil assemblage of the lower Eocene Willwood Formation consists of at least nine distinct endichnia that are preserved in full relief. Four forms (three ichnogenera and four ichnospecies) are new and represent fodinichnia and domichnia of oligochaete worms, an insect or spider, an unknown vertebrate (probably a mammal), and...
Paleoclimatic analyses of middle Eocene through Oligocene planktic foraminiferal faunas
G. Keller
1983, Palaeogeography, Palaeoclimatology, Palaeoecology (43) 73-94
Quantitative faunal analyses and oxygen isotope ranking of individual planktic foraminiferal species from deep sea sequences of three oceans are used to make paleoceanographic and paleoclimatic inferences. Species grouped into surface, intermediate and deep water categories based on δ18O values provide evidence of major changes in water-mass stratification, and individual...
Surface deformation in volcanic rift zones
David D. Pollard, Paul T. Delaney, Wendell A. Duffield, Elliot T. Endo, Arnold T. Okamura
1983, Tectonophysics (94) 541-584
The principal conduits for magma transport within rift zones of basaltic volcanoes are steeply dipping dikes, some of which feed fissure eruptions. Elastic displacements accompanying a single dike emplacement elevate the flanks of the rift relative to a central depression. Concomitant normal faulting may transform the depression into a graben...
Strain accumulation along the San Andreas fault system east of San Francisco Bay, California
W.H. Prescott, M. Lisowski
1983, Tectonophysics (97) 41-56
The occurrence of several large earthquakes to the east of San Francisco Bay during historical times, and present high levels of microseismicity, indicate that a significant part of the relative plate motion may be occurring east of San Francisco Bay. Furthermore, the Hayward fault is known to be slipping aseismically...
40Ar 39Ar ages and tectonic setting of ophiolite from the Neyriz area, southeast Zagros Range, Iran
Marvin A. Lanphere, Jakob J. Pamic
1983, Tectonophysics (96) 245-256
An ophiolite, considered to be an allochthonous fragment of Tethyan oceanic crust and mantle, crops out near Neyriz in the Zagros Range, Iran. 40Ar39 Ar ages ranging from 76.8 ± 23.8 Ma to 105 ± 23.3 Ma were measured on hornblende from five samples of plagiogranite...
Accumulation of fossil fuels and metallic minerals in active and ancient rift lakes
Eleanora I. Robbins
1983, Tectonophysics (94) 633-658
A study of active and ancient rift systems around the world suggests that accumulations of fossil fuels and metallic minerals are related to the interactions of processes that form rift valleys with those that take place in and around rift lakes. The deposition of the precursors of petroleum, gas, oil...
Separation of arsenic(III) and arsenic(V) in ground waters by ion-exchange
Walter H. Ficklin
1983, Talanta (30) 371-373
The predominant species of arsenic in ground water are probably arsenite and arsenate. These can be separated with a strong anion-exchange resin (Dowex 1 × 8; 100–200 mesh, acetate form) in a 10 cm × 7 mm column. Samples are filtered and acidified with concentrated hydrochloric acid (1 ml per...
An ion-selective electrode method for determination of chlorine in geological materials
P. J. Aruscavage, E.Y. Campbell
1983, Talanta (30) 745-749
A method is presented for the determination of chlorine in geological materials, in which a chloride-selective ion electrode is used after decomposition of the sample with hydrofluoric acid and separation of chlorine in a gas-diffusion cell. Data are presented for 30 geological standard materials. The relative standard deviation of the...
United States Geological Survey Yearbook, fiscal year 1982
U.S. Geological Survey
1983, Report
The fiscal year 1982 Yearbook summarizes the activities of the U.S. Geological Survey in response to its scientific and regulatory missions....
Basic ground-water hydrology
Ralph C. Heath
1983, Water Supply Paper 2220
Land use and land cover digital data
Robin G. Fegeas, Robert W. Claire, Stephen C. Guptill, Eric K. Anderson, Cheryl A. Hallam
1983, Circular 895-E
Digital elevation models
Atef A. Elassal, Vincent M. Caruso
1983, Circular 895-B
Hydrology of area 54, northern Great Plains, and Rocky Mountain coal provinces, Colorado and Wyoming
Gerhard Kuhn, P. D. Daddow, G. S. Craig
1983, Open-File Report 83-146
A nationwide need for information characterizing hydrologic conditions in mined and potential mine areas has become paramount with the enactment of the Surface Mining Control and Reclamation Act of 1977. This report, one in a series covering the coal provinces nationwide, presents information thematically by describing single hydrologic topics through...
Geographic Names Information System
Roger L. Payne
1983, Circular 895-F
Water quality of Lake Arlington on Village Creek, north-central Texas; 1973 to 1981
Freeman L. Andrews, Willard J. Gibbons
1983, Water-Resources Investigations Report 83-4196
Water in Lake Arlington on Village Creek in north-central Texas had volume-weighted average concentrations of less than 240 milligrams per liter of dissolved solids, less than 30 milligrams per liter of dissolved chloride, and less than 40 milligrams per liter of dissolved sulfate between January 29, 1973, and August 20,...
Geologic maps of the Big Sandy, West Elliotts Creek, and Reed Brake Roadless Areas, Tuscaloosa, Hale, and Bibb counties, Alabama
M.W. Szabo, S. H. Patterson
1983, Miscellaneous Field Studies Map 1505-A
Map showing outcrops of basaltic rocks of early Quaternary and Tertiary age, Basin and Range province, Southern California
Kurt Roggensack, David A. Lopez
1983, Water-Resources Investigations Report 83-4116-G
This map report is one of a series of geologic and hydrologic maps covering all or parts of States within the Basin and Range province of the western United States. The map reports contain detailed information on subjects that characterize the geohydrology of the province, including the ground-water hydrology/ ground-water...
Geologic map of the Wenaha Tucannon Wilderness, Washington and Oregon
D. A. Swanson, T. L. Wright
1983, Miscellaneous Field Studies Map 1536
Mineral surveys by the Geological Survey and the Bureau of Mines of Bureau of Land Management Wilderness Study Areas
Helen M. Beikman, Margaret Hinkle, Twila Frieders, Susan M. Marcus, James R. Edward
1983, Circular 901
The Federal Land Policy and Management Act of 1976 instructed the Bureau of Land Management (BLM) to review all public lands under its jurisdiction and to determine their suitability or nonsuitability for wilderness designation. As part of this process, the Geological Survey and the Bureau of Mines conduct mineral surveys...
Hydrogeology of a landfill, Pinellas County, Florida
Mario Fernandez Jr.
1983, Water-Resources Investigations Report 82-30
The Pinellas County landfill site is on a flat, coastal area characterized by a high water table is subject to tidal flooding. Altitudes within the study area range from 8 to 12 feet above sea level. Three geohydrologic units underlie the landfill site: a surficial aquifer about 19 feet thick...
Seismic engineering program report, September-December 1980
Water Resources Division, U.S. Geological Survey
1983, Circular 854-C
Municipal solid-waste disposal and ground-water quality in a coastal environment, west-central Florida
Mario Fernandez Jr.
1983, Water-Resources Investigations Report 83-4072
Solid waste is defined along with various methods of disposal and the hydrogeologic factors to be considered when locating land-fills is presented. Types of solid waste, composition, and sources are identified. Generation of municipal solid waste in Florida has been estimated at 4.5 pounds per day per person or about...
Underwater gravity meter survey of San Francisco and San Pablo bays, California, 1982
Jonathan R. Childs, L. A. Beyer, D. S. McCulloch, G.A. McHendrie, W. C. Steele
1983, Open-File Report 83-906
Seafloor gravity measurements were made at 281 bottom stations in San Francisco and San Pablo Bays, California, on a series of lines oriented approximately NNE.. Line spacing was approximately 2.8 km and stations along the lines mere spaced 0.5 to 1.5 km apart, between 0.5 and 1.5 km perpendicular to...
Proceedings of the Fourth national conference, Water Resources Division, U. S. Geological Survey, Ocean City, Maryland, October 18-23, 1981
Edith B. Chase, Miriam Brigida, Joan M. Rubin, editor(s)
1983, Open-File Report 83-126
