The Klamath Falls, Oregon, earthquakes on September 20, 1993
S.R. Brantley
1993, Earthquakes & Volcanoes (USGS) (24) 104-146
The strongest earthquake to strike Oregon in more than 50 yrs struck the southern part of the State on September 20, 1993. These shocks, a magnitude 5.9 earthquake at 8:28pm and a magnitude 6.0 earthquake at 10:45pm, were the opening salvo in a swarm of earthquakes that continued for more...
Seasonal use of conservation reserve program lands by white-tailed deer in east-central South Dakota
Jeffrey H. Gould, Kurt J. Jenkins
1993, Wildlife Society Bulletin (21) 250-255
The Conservation Reserve Program (CRP_, a provision of the 1985 Food Security Act, subsidizes landowners to take highly erodible lands out of cultivation and seed them to perennial cover for 10years. In eastern South Dakota, 0.5 million ha were enrolled in the CRP from 1985 to 1990 (Agric. Stabilization and...
First collection of rudd, Scardinius erythrophthalmus (Cyprinidae), in the New River, West Virginia
R.S. Easton, D.J. Orth, N.M. Burkhead
1993, Journal of Freshwater Ecology (8) 263-264
We collected the first rudd, Scardinius erythrophthalmus (Cyprinidae), from the New (Kanawha) River drainage, West Virginia. The rudd has now been reported from 12 states (Arkansas, Kansas, Illinois, Massachusetts, Maine, Missouri, New York, Oklahoma, Virginia, Wisconsin, and West Virginia) and several major river systems. The rapid spread of the rudd has apparently...
Regional and economic geology of Pennsylvanian age coal beds of West Virginia
T.E. Repine Jr., B.M. Blake, K. C. Ashton, N. Fedorko III, A.F. Keiser, E.I. Loud, C.J. Smith, S. McClelland, G.H. McColloch
1993, International Journal of Coal Geology (23) 75-101
West Virginia is the only place in the United States where an entire section of Pennsylvanian age (Upper Carboniferous) strata can be seen. These strata occur within a wedge of rock that thins to the north and west from the southeastern...
Ground-water withdrawals, water levels, and ground-water quality in the Houston district, Texas, with emphasis on 1985-89
D.L. Barbie, G.L. Locke
1993, Water-Resources Investigations Report 92-4180
This report is one in a series of reports prepared by the U.S. Geological Survey, beginning in 1937, on the ground-water resources in the Houston district. The Houston district includes Harris and Galveston Counties, and parts of Brazoria, Fort Bend, Waller, Montgomery, Liberty, and Chambers Counties. The primary emphasis of...
Geology and genesis of the Baid Al Jimalah tungsten deposit, Kingdom of Saudi Arabia
R.J. Kamilli, J. C. Cole, J. E. Elliott, R.E. Criss
1993, Economic Geology (88) 1743-1767
The Baid al Jimalah tungsten deposit in Saudi Arabia (lat 25 degrees 09'N, long 42 degrees 41'E) consists predominantly of swarms of steeply dipping, subparallel, tungsten-bearing quartz veins and of less abundant, smaller stockwork veins. It is spatially, temporally, and genetically associated with a 569 Ma, highly differentiated, porphyritic, two-feldspar...
Response of a 42-storey steel-frame building to the Ms = 7.1 Loma Prieta earthquake
E. Safak
1993, Engineering Structures (15) 403-421
A set of 14 acceleration records was obtained from a 42-storey steel-frame building, the Chevron Building, in San Francisco during the Ms= 7.1">Ms= 7.1 Loma Prieta earthquake of 17 October 1989. Data were analysed using a system identification method based on the discretetime linear filtering, and...
A detailed taxonomy of Upper Cretaceous and lower Tertiary Crassatellidae in the eastern United States: An example of the nature of extinction at the boundary
G. Lynn Wingard
1993, Professional Paper 1535
Current theories on the causes of extinction at the Cretaceous-Tertiary boundary have been based on previously published data; however, few workers have stopped to ask the question, 'How good is the basic data set?' To test the accuracy of the published record, a quantitative and qualitative analysis of the Crassatellidae...
Significant bed elevation changes related to Gulf Stream dynamics on the South Carolina continental shelf
G. Gelfenbaum, M. Noble
1993, Continental Shelf Research (13) 385-405
Photographs of the seabed taken from an instrumented bottom tripod located approximately 100 km east of Charleston, South Carolina, reveal bed elevation changes of over 20 cm between July and November 1978. The tripod was in 85 m of water and was equipped with two current meters at 38.7 and...
Natural gas hydrates of the Prudhoe Bay and Kuparuk River area, North Slope, Alaska
Timothy S. Collett
1993, American Association of Petroleum Geologists Bulletin (77) 793-812
Gas hydrates are crystalline substances composed of water and gas, mainly methane, in which a solid-water lattice accommodates gas molecules in a cage-like structure, or clathrate. These substances commonly have been regarded as a potential unconventional source of natural gas because of their enormous gas-storage capacity. Significant quantities of naturally...
Oxygen buffering of Kilauea volcanic gases and the oxygen fugacity of Kilauea basalt
T.M. Gerlach
1993, Geochimica et Cosmochimica Acta (57) 795-814
Volcanic gases collected during episode 1 of the Puu Oo eruption along the east rift zone of Kilauea Volcano, Hawaii, have uniform C-O-H-S-Cl-F compositions that are sharply depleted in CO2. The CO2-poor gases are typical of Type II volcanic gases (gerlach and Graeber, 1985) and were emitted from evolved magma...
Radionuclides in ground water of the Carson River Basin, western Nevada and eastern California, U.S.A.
J. M. Thomas, A. H. Welch, M.S. Lico, J. L. Hughes, R. Whitney
1993, Applied Geochemistry (8) 447-471
Ground water is the main source of domestic and public supply in the Carson River Basin. Ground water originates as precipitation primarily in the Sierra Nevada in the western part of Carson and Eagle Valleys, and flows down gradient in the direction of the Carson River through Dayton and Churchill...
Simulation and mapping of soil-water conditions in the Great Plains
R. B. Zelt, J. T. Dugan
1993, Water Resources Bulletin (29) 939-948
Soil-water conditions provide valuable insight into the hydrologic system in an area. A soil-water balance quantitatively summarizes soil-water conditions and is based on climatic, soil, and vegetation characteristics that vary spatially and temporally. Soil-water balances in the Great Plains of the central United States were simulated for 1951-1980. Results of...
Constraints in the hot-dry-rock resources of the united states
John Sass, Marianne Guffanti
Anon, editor(s)
1993, Conference Paper, Transactions - Geothermal Resources Council
As with hydrothermal systems, the western U.S has higher HDR potential overall than the eastern U.S. because geothermal gradients on average are higher in the west. Nevertheless, some attractive exploration targets occur in the eastern U.S. The most favorable target in the eastern U.S. (defined here to include the Great...
A guide to continent-ocean transect E-1: Adirondacks to Georges Bank
James B. Thompson Jr., Wallace A. Bothner, Peter Robinson, Yngvar W. Isachsen, Kim D. Klitgord
James B. Thompson Jr., Wallace A. Bothner, Peter Robinson, Kim D. Klitgord, editor(s)
1993, GSA's DNAG Continent-Ocean Transect Series 17
The geologic strip-map for Transect E-l cuts a swath from the Thousand Islands region on the New York-Ontario border to the Atlantic Ocean floor off Georges Bank (see Fig. 1). It includes portions of New York, Ontario and of all of the New England states. The western part, mainly in...
Subsurface temperatures and geothermal gradients on the north slope of Alaska
Timothy S. Collett, Kenneth J. Bird, Leslie B. Magoon
1993, Cold Regions Science and Technology (21) 275-293
On the North Slope of Alaska, geothermal gradient data are available from high-resolution, equilibrated well-bore surveys and from estimates based on well-log identification of the base of ice-bearing permafrost. A total of 46 North Slope wells, considered to be in or near thermal equilibrium, have been surveyed with high-resolution temperatures...
Petrology and U-Pb geochronology of buried Avalonian plutonic rocks on southeastern Cape Cod
G. W. Leo, J.K. Mortensen, B. Barreiro, J. D. Phillips
1993, Atlantic Geology (29) 103-113
Plutonic rocks have been intersected by two separate drill holes on southeastern Cape Cod. Hole CC2 is located at Chatham Harbor about 7 km south of the Nauset anomaly, an east-northeast-trending magnetic lineament that was considered to separate the distinct plutonic zones of Avalon terrane. This drill hole intersected weakly...
Chapter 4: Cretaceous thrusting and Neogene block rotation in the northern Portneuf Range region, southeastern Idaho
Karl S. Kellogg
1992, Memoir of the Geological Society of America (179) 95-113
The Putnam thrust has long been recognized as an important Mesozoic structure in the northern Portneuf Range, southeastern Idaho. At most localities, the thrust places Ordovician rocks above Permian and Pennsylvanian rocks, although near its southeastern extent, it ramps laterally downsection to the southeast. At its southeasternmost exposures, Cambrian rocks...
A theoretical model for the flux of radon from rock to ground water
Richard B. Wanty, Errol P. Lawrence, Linda C. Gundersen
1992, GSA Special Papers (271)
A model is derived to predict the abundance of 222Rn in ground water in contact with a rock of known uranium content. The model assumes that secular equilibrium is attained in the rock-water system as a whole, but is independent of any microscopic geometric properties of the system. The key...
A postulated new source for the White River Ash, Alaska: A section in Geologic studies in Alaska by the US. Geological Survey, 1990
Robert G. McGimsey, Donald H. Richter, Gregory D. DuBois, T. P. Miller
1992, Bulletin 1999
The White River Ash (Lerbekmo and others, 1968), product of two of the most voluminous pyroclastic eruptions in North America in the past 2,000 yr, blankets much of the Yukon Terrtory, Canada, and a small part of adjoining eastern Alaska. Lerbekmo and Campbell (1969) narrowed the source of the ash...
Puffins as samplers of juvenile pollock and other forage fish in the Gulf of Alaska
Scott Hatch, Gerald A. Sanger
1992, Marine Ecology Progress Series (80) 1-14
We sampled the nestling diets of tufted puffins (Fratercula cirrhata) and horned puffins (F. corniculata) in 3 years at colonies from the north-central Gulf of Alaska to the eastern Aleutian Islands, Alaska, USA. Overall, tufted puffins consumed (by weight) 41% sandlance (Ammodytes hexapterus), 22% capelin (Mallotus villosus), 19% walleye pollock...
Organochlorines and mercury in osprey eggs from the eastern United States
D. J. Audet, D.S. Scott, Stanley N. Wiemeyer
1992, Journal of Raptor Research (26) 219-224
Organochlorine and mercury concentrations were determined in Osprey eggs collected from Maryland, Virginia, and Massachusetts during 1986-87. DDE concentrations were significantly different among locations. Median DDE concentrations did not decline significantly in eggs from Glenn L. Martin National Wildlife Refuge, Maryland, between 1973 and 1986. The median DDE residue for...
Geographic patterns in population trends of neotropical migrants in North America
J.R. Sauer, Sam Droege
John M. Hagan III, D.W. Johnston, editor(s)
1992, Book chapter, Ecology and Conservation of Neotropical Migrant Landbirds
We use the route-regression method to estimate the population trends of 100 species of Neotropical migrants using data from the North American Breeding Bird Survey (BBS). We examine long-term (1966-1988) and recent (1978-1988) trends. In the long-term, more species of Neotropical migrants were increasing than were decreasing in...
Prevention of eastern equine encephalitis virus in captive cranes
J. W. Carpenter, D.M. Watts, C.L. Crabbs, G.G. Clark, T.W. Scott, D. Docherty, B.B. Pagac, J.M. Dorothy, J.G. Olson, F. J. Dein
Don A. Wood, editor(s)
1992, Book chapter, Proceedings of the 1988 North American Crane Workshop
Speculations on the origin of the North American Midcontinent rift
W.F. Cannon, W. J. Hinze
1992, Tectonophysics (213) 49-55
The Midcontinent rift is an example of lithospheric extension and flood basalt volcanism induced when a new mantle plume arrived near the base of the lithosphere. Very large volumes of basaltic magma were generated and partly erupted before substantial lithospheric extension began. Volcanism continued, along with extension and deep rift...
