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Page 4141, results 103501 - 103525

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Slumgullion; Colorado’s natural landslide laboratory
L.M. Highland
1993, Earthquakes & Volcanoes (USGS) (24) 208-221
The mammoth Slumgullion landslide in southwestern Colorado is the largest actively moving landslide in Colorado and, perhaps, the entire country. To learn more about how and why landslides move the way they do, scientists at the U.S Geological Survey (USGS) have observed and monitored the remarkably regular movement of this...
Determination of dissolved-phase pesticides in surface water from the Yakima River basin, Washington, using the Goulden large-sample extractor and gas chromatography/mass spectrometer
Gregory D. Foster, Paul M. Gates, William T. Foreman, Stuart W. McKenzie, Frank A. Rinella
1993, Environmental Science & Technology (27) 1911-1917
Concentrations of pesticides in the dissolved phase of surface water samples from the Yakima River basin, WA, were determined using preconcentration in the Goulden large-sample extractor (GLSE) and gas chromatography/mass spectrometry (GC/MS) analysis. Sample volumes ranging from 10 to 120 L were processed with the GLSE, and the results from...
Dinoflagellates
Lucy E. Edwards
1993, Book chapter, Fossil prokaryotes and protists
No abstract available....
Diatoms
J.A. Barron
1993, Book chapter, Fossil prokaryotes and protists
No abstract available ...
Toxicity and bioaccumulation of waterborne and dietary selenium in juvenile bluegill (Lepomis macrochirus)
Laverne Cleveland, Edward E. Little, Denny R. Buckler, Raymond H. Wiedmeyer
1993, Aquatic Toxicology (27) 265-279
Juvenile bluegill (Lepomis macrochirus) were exposed to waterborne selenium as a 6:1 mixture of selenate to selenite (as Se) for 60 d and to dietary seleno-l-methionine for 90 d. Measured concentrations of total selenium in the waterborne exposure ranged from 0.16 to 2.8 mg/l, and concentrations of seleno-l-methionine...
Scaling of the critical slip distance for seismic faulting with shear strain in fault zones
Chris Marone, Brian D. Kilgore
1993, Nature (362) 618-621
THEORETICAL and experimentally based laws for seismic faulting contain a critical slip distance1-5, Dc, which is the slip over which strength breaks down during earthquake nucleation. On an earthquake-generating fault, this distance plays a key role in determining the rupture nucleation dimension6, the amount of premonitory and post-seismic slip7-10, and...
Intensity and duration of chemical weathering: An example from soil clays of the southeastern Koolau Mountains, Oahu, Hawaii
Mark J. Johnsson, Stephen D. Ellen, Mary Anne McKittrick
1993, Special Paper of the Geological Society of America (284) 147-170
Orographic precipitation on the southern flank of the southeastern Koolau Mountains produces a pronounced precipitation gradient. The corresponding gradient in the intensity of the chemical weathering environment provides an opportunity to address the effects of varying chemical weathering intensity on the composition of clay-size weathering products in soils developed...
Managing the data explosion
Richard P. Hooper, Brent T. Aulenbach
1993, Civil Engineering (63) 74-76
The 'data explosion' brought on by electronic sensors and automatic samplers can strain the capabilities of existing water-quality data-management systems just when they're needed most to process the information. The U.S. Geological Survey has responded to the problem by setting up an innovative system that allows rapid data analysis....
Broad-band acoustic Doppler current profiler
Ernest D. Cobb
1993, Flow Measurement and Instrumentation (4) 35-37
The broad-band acoustic Doppler current profiler is an instrument that determines velocity based on the Doppler principle by reflecting acoustic signals off sediment particles in the water. The instrument is capable of measuring velocity magnitude and direction throughout a water column and of measuring water depth. It is also capable...
Evidence for Holocene stability of steep slopes, northern Peruvian Andes, based on soils and radiocarbon dates
D. C. Miller, P. W. Birkeland, D. T. Rodbell
1993, Catena (20) 1-12
Radiocarbon dating and soil relationships indicate that landscapes in highaltitude glaciated valleys of the northern Peruvian Andes have been remarkably stable during the Holocene. Radiocarbon dates show that deglaciation was underway by 12 ka, and that slopes and alluvial fans at the bases of slopes were essentially stabilized by at...
Great Basin NP and USGS cooperate on a geologic mapping program
Janet L. Brown, Vidal Davila Jr.
1993, Park Science (13) 6-7
The GRBA draft General Management Plan proposes development in several locations in Kious Spring and Lehman Caves 1:24,000 topographic quadrangles, and these proposed developments need geologic evaluation before construction. Brown will act as project manager to coordinate the IA with time frames, budget constraints, and the timely preparation of required...
Reconnaissance investigation of water quality, bottom sediment, and biota associated with irrigation drainage in the Pine River Project area, Southern Ute Indian Reservation, southwestern Colorado and northwestern New Mexico, 1988-89
D. L. Butler, R. P. Krueger, B. C. Osmundson, A. L. Thompson, J. J. Formea, D. W. Wickman
1993, Water-Resources Investigations Report 92-4188
During 1988-89, water, bottom sediment, biota, soil, and plants were sampled for a reconnaissance investigation of the Pine River Project area in southwestern Colorado. Irrigation drainage does not seem to be a major source of dissolved solids in streams. Concentrations of manganese, mercury, and selenium exceeded drinking-water regulations in some...