Conference Papers
Science Quality and Integrity
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The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
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Gypsum accumulation on carbonate stone
The accumulation of gypsum on carbonate stone has been investigated through exposure of fresh samples of limestone and marble at monitored sites, through examination of alteration crusts from old buildings and through laboratory experiments. Several factors contribute to gypsum accumulation on carbonate stone. Marble or limestone that is sheltered from direct washing by rain in an urban environmen
Authors
E. S. McGee, V.G. Mossotti
Hayward fault: Large earthquakes versus surface creep
The Hayward fault, thought a likely source of large earthquakes in the next few decades, has generated two large historic earthquakes (about magnitude 7), one in 1836 and another in 1868. We know little about the 1836 event, but the 1868 event had a surface rupture extending 41 km along the southern Hayward fault. Right-lateral surface slip occurred in 1868, but was not well measured. Witness acco
Authors
James J. Lienkaemper, Glenn Borchardt
Highlights of the 13 March 1992 Erzincan (Turkey) earthquake
The March 13, 1992 Ms = 6.8 Erzincan earthquake in Turkey is highlighted here. The epicenter of this earthquake was located 7.7 km from the eastern end of the North Anatolian fault. The strong motions recorded in Erzincan had peak ground accelerations of approximately 0.5 g, accompanied by a pulse of 2 seconds. The duration of the earthquake was 7 seconds. This earthquake caused collapse of about
Authors
Mehmet Çelebi
Hydraulic conductivity of landfill liners containing benzyltriethylammonium-bentonite
Varying weight percentages of an Ottawa sand, benzyltriethylammonium-bentonite (BTEA-clay), Wyoming bentonite (Na-clay), and water were mixed uniformly and compacted to simulate sand-and-clay liners for waste-disposal facilities. The hydraulic conductivities of the compacted soil cores were measured in triplicate. The hydraulic conductivities of cores containing 92 percent sand and 8 percent BTEA-
Authors
James A. Smith, Pamela M. Franklin, Peter R. Jaffe
Identification of persisten anionic surfactant-derived chemicals in sewage effluent and groundwater
Preparative isolation and fractionation procedures coupled with spectrometric analyses were used to identify surfactant-derived contaminants in sewage effluent and sewage-contaminated groundwater from a site located on Cape Cod, Massachusetts. Anionic surfactants and their biodegradation intermediates were isolated from field samples by ion exchange and fractionated by solvent extraction and adsor
Authors
J.A. Field, J. A. Leenheer, K. A. Thorn, L.B. Barber, C. Rostad, D.L. Macalady, S.R. Daniel
Impact of bacterial kidney disease on Chinook salmon smolts during migration, collection, and transportation
No abstract available
Authors
D.G. Elliott
Impact of bacterial kidney disease on Chinook salmon smolts during migration, collection, and transportation
No abstract available.
Authors
Diane G. Elliott
In vitro effects of heavy metals on the nonspecific defense mechanisms and immune response of fish
No abstract available at this time
Authors
G. Jeney, D. Anderson, Z. Jeney
Interaction Assessment III. Predicting population-level impacts of toxicants and pesticides
No abstract available
Authors
J.M. Emlen
Late Cenozoic faulting at the boundary between the Mojave and Sonoran blocks; Bristol Lake area, California
No abstract available
Authors
K. A. Howard, D. M. Miller
Lead poisoning of avian species other than waterfowl
No abstract available.
Authors
Louis N. Locke, Milton Friend
Locating well sites in the Georgia Piedmont using a geographic information system
No abstract available.
Authors
J.S. Clarke, K.W. McFadden