Mineralization patterns in time and space in the Great Basin of Nevada
Dennis P. Cox, Steve Ludington, M.G. Sherlock, Donald A. Singer
1991, Conference Paper, Geology and Ore Deposits of the Great Basin--Symposium Proceedings
No abstract available....
Effectiveness of fences and culverts for protecting desert tortoises along California Highway 58: final report on study design
W.I. Boarman
1991, Report
No abstract available at this time...
Distribution and breeding status of the least Bell's vireo at the San Luis Rey River, San Diego County, California, 1991
B.E. Kus
1991, Report
No abstract available at this time...
Status of the least Bell's vireo at the West San Luis Rey River, San Diego County, California, 1990
B.E. Kus
1991, Report
No abstract available at this time...
Impacts of changing irrigation practices on waterfowl habitat use in the southern San Joaquin Valley, California
D. A. Barnum, N. H . Euliss Jr.
1991, California Fish and Game (77) 10-21
We used diurnal aerial census data to examine habitat use patterns of ducks wintering in the southern San Joaquin Valley, California from 1980-87. We calculated densities (birds/ha) for the northern pintail (Anas acuta), mallard (A. platyrhynchos), green-winged teal (A. crecca), cinnamon teal (A. cyanoptera), shoveler (A. clypeata), ruddy duck (Oxyura...
Native Grassland Assessment, Mitigation and Restoration Plan for Ahmanson Ranch. Ahmanson Land Company, Agoura, CA
Jon E. Keeley
1991, Report
No abstract available at this time...
Review of geochemical reference sample programs since G-1 and W-1: Progress to date and remaining challenges
J. S. Kane
1991, Spectrochimica Acta Part B: Atomic Spectroscopy (46) 1623-1638
A brief history of programs to develop geochemical reference samples and certified reference samples for use in geochemical analysis is presented. While progress has been made since G-1 and W-1 were issued, many challenges remain....
Seasonal and geothermal production variations in concentrations of He and CO2 in soil gases, Roosevelt Hot Springs Known Geothermal Resource Area, Utah, U.S.A.
M. E. Hinkle
1991, Applied Geochemistry (6) 35-47
To increase understanding of natural variations in soil gas concentrations, CO2, He, O2 and N2 were measured in soil gases collected regularly for several months from four sites at the Roosevelt Hot Springs Known Geothermal Resource Area, Utah. Soil temperature, air temperature, per...
Acid rain, a threat to aquatic resources
R.K. Schreiber
Carmichael, Gea, editor(s)
1991, Book chapter, Sea Fare Cookbook
No abstract available at this time...
Hatchery management of lake trout exposed to chronic dissolved gas supersaturation
W. F. Krise
1991, Book chapter
No abstract available at this time...
The evolution of National Park Service fire policy
J. W. van Wagtendonk
1991, General Technical Report SE-69
No abstract available at this time...
U-series dating of impure carbonates: An isochron technique using total-sample dissolution
J. L. Bischoff, J.A. Fitzpatrick
1991, Geochimica et Cosmochimica Acta (55) 543-554
U-series dating is a well-established technique for age determination of Late Quaternary carbonates. Materials of sufficient purity for nominal dating, however, are not as common as materials with mechanically inseparable aluminosilicate detritus. Detritus contaminates the sample with extraneous Th. We propose that correction for contamination is best accomplished with the...
Subyearling American shad concentrate in swifter current in the upper Delaware River
R. M. Ross, T. W. H. Backman
1991, Research Information Bulletin 58
No abstract available....
Organic matter variations in transgressive and regressive shales
M.A. Pasley, W.A. Gregory, G.F. Hart
1991, Organic Geochemistry (17) 483-509
Organic matter in the Upper Cretaceous Mancos Shale adjacent to the Tocito Sandstone in the San Juan Basin of New Mexico was characterized using organic petrology and organic geochemistry. Differences in the organic matter found in these regressive and transgressive offshore marine sediments have been documented and assessed within a...
Studies of a peatified angiosperm log cross section from Indonesia by nuclear magnetic resonance spectroscopy and analytical pyrolysis
Anne L. Bates, Patrick G. Hatcher, Harry E. Lerch, C. B. Cecil, S.G. Neuzil, Supardi
1991, Organic Geochemistry (17) 37-45
Samples from a 10 cm cross-sectional radius of a peatified angiosperm log from Sumatra, Indonesia, were examined by 13C nuclear magnetic resonance and pyrolysis-gas chromatography in order to understand chemical changes due to the peatification process. NMR results show degradation by selective loss...
Variation of organic sulfur in macerals of selected Illinois Basin coals
I. Demir, R.D. Harvey
1991, Organic Geochemistry (17) 525-533
An electron microbeam technique was used to determine the distribution of organic sulfur in the main macerals of five Illinois Basin coals. On average, sporinites are the highest, inertinites the lowest, and vitrinites intermediate in organic sulfur for each coal. The observed differences are likely due to varying affinities of...
Evolution of a Permo-Triassic sedimentary melange, Grindstone terrane, east-central Oregon
C.D. Blome, M.K. Nestell
1991, Geological Society of America Bulletin (103) 1280-1296
The Grindstone terrane in east-central Oregon is one of the few areas in western North America where large blocks of unmetamorphosed Devonian, Mississippian, and Permian limestones are inter mixed with Permian and Lower Triassic radiolarian chert and Pennsylvanian?, Permian, and Triassic volcaniclastic rocks. Although originally described as parts of a...
Relation of sediment load and flood-plain formation to climatic variability, Paria River drainage basin, Utah and Arizona
J.B. Graf, R. H. Webb, R. Hereford
1991, Geological Society of America Bulletin (103) 1405-1415
Suspended-sediment load, flow volume, and flood characteristics of the Paria River were analyzed to determine their relation to climate and flood-plain alluviation between 1923 and 1986. Flood-plain alluviation began about 1940 at a time of decreasing magnitude and frequency of floods in winter, summer, and fall. No floods with stages...
Petrogenesis and geological history of a uranium source rock: a case study in northeastern Washington, U.S.A.
R. A. Zielinski, R.C. Burruss
1991, Applied Geochemistry (6) 597-612
A small (4 km2) drainage basin in northeastern Washington contains highly uraniferous groundwater and highly uraniferous peaty sediments of Holocene age. The U is derived from granitic bedrock that underlies the entire drainage basin and that contains 9–16 ppm U. This...
Stress magnitudes in the crust: constraints from stress orientation and relative magnitude data
M.L. Zoback, M. Magee
1991, Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences (337) 181-194
The World Stress Map Project is a global cooperative effort to compile and interpret data on the orientation and relative magnitudes of the contemporary in situ tectonic stress field in the Earth's lithosphere. The intraplate stress field in both the oceans and continents is largely compressional with one or both...
Floods of February and March 1990 in Alabama, Georgia, and Florida
J. L. Pearman, T. C. Stamey, G. W. Hess, G. H. Nelson Jr.
1991, Water-Resources Investigations Report 91-4089
No abstract available....
Areal extent, hydrogeologic characteristics, and possible origins of the carbonate rock Newburg Zone (Middle-Upper Silurian) in Ohio
M.L. Strobel, E. F. Bugliosi
1991, Ohio Journal of Science (91) 209-215
The zone occurs in carbonate rocks of Middle to Late Silurian age across much of Ohio. Known also to well drillers as the "Second Water' in the "Big Lime' carbonate sequence, the Newburg zone is a source of hydrocarbons in northeast Ohio, brines in southeast Ohio, and a widespread source...
Multicycle slip distribution along a laboratory fault
Chi-Yu King
1991, Journal of Geophysical Research (96)
Slip distribution along a laboratory fault, which consists of eight spring-connected blocks that are elastically driven to slide on a frictional surface, has been examined for a “long” sequence of slip events to test the applicability of some conceptual models proposed recently in the literature. The...
Tectonic framework of the central Walker Lane region: Yerington to Tonopah, Nevada
R.F. Hardyman, D. A. John, J. S. Oldow
1991, Book chapter, Geology and ore deposits of the Great Basin
No abstract available ...
Spatial Data Transfer Standard and efforts to develop a federal Profile for Vector Data
Matthew H. McDermott, Anthony DeWitt
1991, Conference Paper, GIS/LIS 1991 ACSM-ASPRS Fall Convention
The ongoing efforts to create a more accessible and user friendly Spatial Data Transfer Standard include the development of a Profile for Vector Data and the development of a library of public domain software tools to support the encoding and decoding process. A profile is, in effect, a limited subset...
