Conference Papers
Science Quality and Integrity
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse almost 5,000 conference papers authored by our scientists and refine search by topic, location, year, and advanced search.
Filter Total Items: 5518
Effects of flow and smoltification on the migration rates of spring Chinook salmon and steelhead Effects of flow and smoltification on the migration rates of spring Chinook salmon and steelhead
No abstract available
Authors
J.W. Beeman, D.W. Rondorf
Environmental influences on major waterfowl diseases Environmental influences on major waterfowl diseases
The decline of North American waterfowl resources since the 1960s is well-known to this audience and need not be detailed to establish that population numbers for several key waterfowl species are at or near their lowest levels since records have been kept. Loss of habitat is an accepted major cause for the decline of waterfowl numbers and the wildlife conservation community is...
Authors
M. Friend
Geochemical heterogeneity in a sand and gravel aquifer: Effect of sediment mineralogy and particle size on the sorption of chlorobenzenes Geochemical heterogeneity in a sand and gravel aquifer: Effect of sediment mineralogy and particle size on the sorption of chlorobenzenes
The effect of particle size, mineralogy and sediment organic carbon (SOC) on solution of tetrachlorobenzene and pentachlorobenzene was evaluated using batch-isotherm experiments on sediment particle-size and mineralogical fractions from a sand and gravel aquifer, Cape Cod, Massachusetts. Concentration of SOC and sorption of chlorobenzenes increase with decreasing particle size. For a...
Authors
L.B. Barber, E.M. Thurman, D.R. Runnells
Geology of Keweenawan Supergroup Rocks near the Porcupine Mountains, Ontonagon and Gogebic Counties, Michigan Geology of Keweenawan Supergroup Rocks near the Porcupine Mountains, Ontonagon and Gogebic Counties, Michigan
This field trip examines the geology of rocks of the Keweenawan Supergroup (1 .1 Ga) and related intrusive rocks of the Midcontinent rift system (MRS) in the western part of the northern peninsula of Michigan. The combination of stops includes all formations of the Keweenawan Supergroup in this region. Examination of all described localities requires more than a single day and...
Authors
William F. Cannon, Suzanne W. Nicholson, Cheryl A. Hedgman, Laurel G. Woodruff, Klaus J. Schul
Geomorphic response to the 1989-90 eruptions of Redoubt Volcano, Alaska Geomorphic response to the 1989-90 eruptions of Redoubt Volcano, Alaska
No abstract available.
Authors
J.M. Dorava
Ground-water-quality monitoring for septic-tank-use effects, central New Mexico Ground-water-quality monitoring for septic-tank-use effects, central New Mexico
No abstract available
Authors
G.E. Kues
Gypsum accumulation on carbonate stone 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
Authors
E. S. McGee, V.G. Mossotti
Hayward fault: Large earthquakes versus surface creep 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...
Authors
James J. Lienkaemper, Glenn Borchardt
Highlights of the 13 March 1992 Erzincan (Turkey) earthquake 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...
Authors
Mehmet Çelebi
Hydraulic conductivity of landfill liners containing benzyltriethylammonium-bentonite 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...
Authors
James A. Smith, Pamela M. Franklin, Peter R. Jaffe
Identification of persisten anionic surfactant-derived chemicals in sewage effluent and groundwater 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...
Authors
J.A. Field, J.A. Leenheer, K. A. Thorn, L.B. Barber, C. Rostad, D.L. Macalady, S.R. Daniel