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Page 3580, results 89476 - 89500

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Volcano hazards at Newberry Volcano, Oregon
David R. Sherrod, Larry G. Mastin, William E. Scott, Steven P. Schilling
1997, Open-File Report 97-513
Newberry volcano is a broad shield volcano located in central Oregon. It has been built by thousands of eruptions, beginning about 600,000 years ago. At least 25 vents on the flanks and summit have been active during several eruptive episodes of the past 10,000 years. The most recent eruption 1,300...
Geology of Point Reyes National Seashore and vicinity, California: A digital database
Jospeh C. Clark, Earl E. Brabb
1997, Open-File Report 97-456
This Open-File report is a digital geologic map database. This pamphlet serves to introduce and describe the digital data. There is no paper map included in the Open-File report. The report does include, however, a PostScript plot file containing an image of the geologic map sheet with...
Occurrence of dissolved solids, nutrients, atrazine, and fecal coliform bacteria during low flow in the Cheney Reservoir watershed, south-central Kansas, 1996
V.G. Christensen, L. M. Pope
1997, Water-Resources Investigations Report 97-4153
A network of 34 stream sampling sites was established in the 1,005-square-mile Cheney Reservoir watershed, south-central Kansas, to evaluate spatial variability in concentrations of selected water-quality constituents during low flow. Land use in the Cheney Reservoir watershed is almost entirely agricultural, consisting of pasture and cropland. Cheney Reservoir provides 40...
Evaluation of drawdown and sources of water in the Mississippi River alluvium caused by hypothetical pumping, Muscatine, Iowa
K.J. Lucey
1997, Water-Resources Investigations Report 97-4162
A study was conducted to evaluate drawdown and volumetric changes in sources of water in the Mississippi River alluvium caused by hypothetical pumping. A steady-state, ground-water flow model was constructed for a previous study to simulate February 1993 hydrologic conditions, which were assumed to be an acceptable estimate of the...
Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory-Use of a modified ultrasonic nebulizer for the analysis of low ionic-strength water by inductively coupled optical emission spectrometry
Carl M. Harris, Charles J. Litteral, Donna L. Damrau
1997, Open-File Report 97-382
The U.S. Geological Survey National Water Quality Laboratory has developed a method for the determination of dissolved calcium, iron, magnesium, manganese, silica, and sodium using a modified ultrasonic nebulizer sample-introduction system to an inductively coupled plasma-optical emission spectrometer. The nebulizer's spray chamber has been modified to avoid carryover and memory...
Trace-element concentrations and transport in the Coeur d'Alene river, Idaho, water years 1993-94
Michael A. Beckwith, Paul F. Woods, Charles Berenbrock
1997, Open-File Report 97-398
for almost a century, the U.S. Geological Survey has collected hydrologic data at a network of stream-gaging stations throughout the Coeur d'Alene Lake and River drainage basin. Since 1990, extensive water-quality data have been collected for a comprehensive study of potential eutrophication of Coeur d'Alene Lake and for assessment of...
Coal availability in the Hilight Quadrangle, Powder River Basin, Wyoming; a prototype study in a western coal field
Carol L. Molnia, Laura Biewick, Dorsey Blake, Susan J. Tewalt, M. Devereaux Carter, Charlie Gaskill
1997, Open-File Report 97-469
The U.S. Geological Survey (USGS), in cooperation with the Bureau of Land Management (BLM), Geological Survey of Wyoming, and U.S. Bureau of Mines (USBM), has produced an estimate of the amount of available coal in an area about 35 miles south of Gillette, Wyo., where the Wyodak coal bed is,...
Field guide for collecting samples for analysis of volatile organic compounds in stream water for the National Water-Quality Assessment Program
Larry R. Shelton
1997, Open-File Report 97-401
For many years, stream samples for analysis of volatile organic compounds have been collected without specific guidelines or a sampler designed to avoid analyte loss. In 1996, the U.S. Geological Survey's National Water-Quality Assessment Program began aggressively monitoring urban stream-water for volatile organic compounds. To assure representative samples and consistency...