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.
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FINDINGS OF A SYMPOSIUM ON COAL QUALITY.
The U. S. Geological Survey (USGS) has been doing research on coal quality for almost a century. Most of the work of the USGS regarding coal went into efforts to assess the quantity of coal in the United States, not the quality. On April 9-11, 1985, the U. S. Geological Survey, along with cosponsors - the Association of American State Geologists, the U. S. Department of Energy, the Electric Power
Authors
Stanley P. Schweinfurth, Susan Garbini
Fish cell lines: establishment of a cell line from American shad
No abstract available at this time
Authors
B. C. Lidgerding
Flocking and predator avoidance in wintering sandpipers
No abstract available at this time
Authors
B.E. Kus
FLUORINE IN COLORADO OIL SHALE.
Oil shale from the lower part of the Eocene Green River Formation in the Piceance Creek Basin, Colorado, averages 0. 13 weight percent fluorine, which is about twice that found in common shales, but is the same as the average amount found in some oil shales from other parts of the world. Some fluorine may reside in fluorapatite; however, limited data suggest that cryolite may be quantitatively mor
Authors
John R. Dyni
GAINS AND LOSSES OF COMMINGLED WATERS IN A STREAM.
In a legal dispute in the State of Washington (Colville Confederated Tribes vs. Boyd Walton, Jr. , Farmer), it became necessary to determine the proportion of transmission losses sustained by developed water that was commingled with native water in a natural stream channel. Ground-water pumping and irrigation adjacent to the stream resulted in both gains and losses to flow along the study reach. T
Authors
R.D. Mac Nish
GAS HYDRATES AT TWO SITES OF AN ACTIVE CONTINENTAL MARGIN.
Sediment containing gas hydrates from two distant Deep Sea Drilling Project sites (565 and 568), located about 670 km apart on the landward flank of the Middle America Trench, was studied to determine the geochemical conditions that characterize the occurrence of gas hydrates. Site 565 was located in the Pacific Ocean offshore the Nicoya Peninsula of Costa Rica in 3,111 m of water. The depth of th
Authors
K. A. Kvenvolden
GELIFICATION OF WOOD DURING COALIFICATION.
Coalified wood was examined by SEM and CPMAS**1**3C NMR to delineate chemical and physical alterations responsible for gelification. Early coalification selectively degrades cellulosic components, preserving lignin-like components that are eventually transformed to coal. Cellular morphology persists until the chemical composition becomes uniform, at which point the cells coalesce under compaction
Authors
Patrick G. Hatcher, Lisa A. Romankiw, John R. Evans
Geodetic accuracy of Landsat-4 Multispectral Scanner and Thematic Mapper data
EROS Data Center is evaluating the geodetic accuracy of Landsat-4 data from both the Multispectral Scanner (MSS) and Thematic Mapper (TM) processing systems. Geodetic accuracy is a measure of the precision of Landsat data registration to the Earth's figure. This paper describes a geodetic accuracy assessment of several MSS and TM scenes, based on the geodetic referencing information supplied on a
Authors
June M. Thormodsgard, D.J. DeVries
GEOLOGIC PROCESSES AFFECTING THE QUALITY OF THE UPPER FREEPORT COAL BED, WEST-CENTRAL PENNSYLVANIA.
The number or types of origins of the components of a coal bed cannot be determined from its bulk composition. Minerals such as quartz, calcite, and pyrite as well as macerals such as vitrinite can originate from a variety of processes that result from different depositional conditions. The Upper Freeport coal bed was studied and characterized by sampling and analyzing its mappable subunits (facie
Authors
R.W. Stanton, C. B. Cecil, B.S. Pierce, L.F. Ruppert, F.T. Dulong
GROUND-WATER DRAINAGE TO SURFACE MINES REFINED.
Changes in seepage flux and hydraulic head (ground-water level) resulting from ground-water drainage into the first and subsequent cuts of a surface coal mine can be estimated by a technique that considers drainage from the unsaturated zone and drainage effects of the advancing mine. A 'single-layer' technique is used, in which each layer of a stratified aquifer system is considered separately. Us
Authors
Linda S. Weiss
INDUCED SEISMICITY MECHANISM AT THE GEYSERS, CALIFORNIA.
Induced microearthquake activity at The Geysers geothermal reservoir is observed in the vicinity of eight geothermal steam power units. The earthquakes do not align with mapped faults but occur adjacent to steam wells. The sense of motion as deduced from focal mechanisms is strike-slip to reverse in the upper 1 km of the reservoir and changes to strike-slip to oblique normal slip at greater depth
Authors
David Oppenheimer
Influence on non-aromatizable androgens and aromatase inhibition on sex determination in channel catfish
No abstract available at this time
Authors
K. B. Davis, B.A. Simco, C. A. Goudie, R. Snellgrove