Geologic map of the East of Grotto Hills quadrangle, California: A digital database
Jane E. Nielson, David R. Bedford
1999, Open-File Report 99-35
The East of Grotto Hills 1:24,000-scale quadrangle of California lies west of the Colorado River about 30 km southwest of Searchlight, Nevada, near the boundary between the northern and southern parts of the Basin and Range Province. The quadrangle includes the eastern margin of Lanfair Valley, the southernmost part of...
Microbial and spectral reflectance techniques to distinguish neutral and acidic drainage
Eleanora I. Robbins
1999, Fact Sheet 118-99
Acid drainage from abandoned coal mines is affecting thousands of miles of rivers in the eastern United States. U.S. Geological Survey (USGS) scientists are finding that neutral drainage is sometimes being mistaken for acidic drainage because both involve the formation of iron oxide-rich materials. USGS scientists are adapting microbial techniques to learn...
An interpretation of the 1997 airborne electromagnetic (AEM) survey, Fort Huachuca vicinity, Cochise County, Arizona
M.W. Bultman, M. E. Gettings, Jeff Wynn
1999, Open-File Report 99-7-A
Executive Summary -- In March of 1997, an airborne electromagnetic (AEM) survey of the Fort Huachuca Military Reservation and immediate surrounds (location map, http://geopubs.wr.usgs.gov/open-file/of99-007-b/index.jpg) was conducted. This survey was sponsored by the U.S. Army and contracted through the Geologic Division of the U.S. Geological Survey (USGS). Data were gathered by...
Alaska resource data file: Karluk quadrangle
S. H. Pilcher
1999, Open-File Report 99-42
No abstract available....
Finite-element surface-water modeling system; two-dimensional flow in the horizontal plane, addendum to the users manual
J. K. Lee
1999, Open-File Report 97-410
The modeler's influence on calculated solubilities for performance assessments at the Aspo Hard-rock Laboratory
A.T. Ernren, R. Arthur, P. D. Glynn, J. McMurry
1999, Materials Research Society Symposium - Proceedings (556)
Four researchers were asked to provide independent modeled estimates of the solubility of a radionuclide solid phase, specifically Pu(OH)4, under five specified sets of conditions. The objectives of the study were to assess the variability in the results obtained and to determine the primary causes for this variability.In the exercise,...
Physiographic rim of the Grand Canyon, Arizona: A digital database
George H. Billingsley, Haydee M. Hampton
1999, Open-File Report 99-30
This Open-File report is a digital physiographic 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, PostScript and PDF format plot files, each containing an image of the map. For those interested...
DNA repair and resistance to UV-B radiation in western spotted frogs
Andrew R. Blaustein, J.B. Hays, P.D. Hoffman, D.P. Chivers, Joseph M. Kiesecker, William P. Leonard, A. Marco, Deanna H. Olson, Jamie K Reaser, Robert G. Anthony
1999, Ecological Applications (9) 1100-1105
We assessed DNA repair and resistance to solar radiation in eggs of members of the western spotted frog complex (Rana pretiosa and R. luteiventris), species whose populations are suffering severe range reductions and declines. Specifically, we measured the activity of photoreactivating enzyme (photolyase) in oocytes of spotted frogs. In some species, photoreactivation...
Error propagation in spatially explicit population models: A reassessment
Wolf M. Mooij, Donald L. DeAngelis
1999, Conservation Biology (13) 930-933
No abstract available....
Delaware River Basin
Jeffrey M. Fischer
1999, Fact Sheet 056-99
During the past 25 years, industry and government have made large financial investments in manufacturing, processing, and wastewater-treatment facilities to reduce the amount of contaminants being discharged. Although these investments have led to improved water quality across the Nation, concerns about the effects of nutrients, toxins, and pathogens on human...
Kentucky
Water Resources Division, U.S. Geological Survey
1999, Fact Sheet 018-99
Nebraska
Water Resources Division, U.S. Geological Survey
1999, Fact Sheet 028-99
Processing of single channel air and water gun data for imaging an impact structure at the Chesapeake Bay
Myung W. Lee
1999, Bulletin 2169
Processing of 20 seismic profiles acquired in the Chesapeake Bay area aided in analysis of the details of an impact structure and allowed more accurate mapping of the depression caused by a bolide impact. Particular emphasis was placed on enhancement of seismic reflections from the basement. Application of wavelet deconvolution...
Principal facts for about 500 gravity stations in the vicinity of Amargosa Desert and Pahrump Valley, California and Nevada
R. L. Morin, B. A. Chuchel, R.J. Blakely
1999, Open-File Report 99-31
Soil calcium status and the response of stream chemistry to changing acidic deposition rates
G.B. Lawrence, Mark B. David, Gary M. Lovett, Peter S. Murdoch, Douglas A. Burns, John L. Stoddard, Barry P. Baldigo, J.H. Porter, A.W. Thompson
1999, Ecological Applications (9) 1059-1072
Despite a decreasing trend in acidic deposition rates over the past two to three decades, acidified surface waters in the northeastern United States have shown minimal changes. Depletion of soil Ca pools has been suggested as a cause, although changes in soil Ca pools have not been directly related to...
Total materials consumption; an estimation methodology and example using lead; a materials flow analysis
Marilyn B. Biviano, Lorie A. Wagner, Daniel E. Sullivan
1999, Circular 1183
Materials consumption estimates, such as apparent consumption of raw materials, can be important indicators of sustainability. Apparent consumption of raw materials does not account for material contained in manufactured products that are imported or exported and may thus under- or over-estimate total consumption of materials in the domestic economy. This...
Distribution of benthic foraminifers (>125 um) in the surface sediments of the Arctic Ocean
Lisa E. Osterman, Richard Z. Poore, Kevin M. Foley
1999, Bulletin 2164
Census data on benthic foraminifers (>125 ?m) in surface sediment samples from 49 box cores are used to define four depth-controlled biofacies, which will aid in the paleoceanographic reconstruction of the Arctic Ocean. The shelf biofacies contains a mix of shallow-water calcareous and agglutinated species from the continental shelves of the Beaufort and Chukchi Seas and...
Aeromagnetic survey in Wisconsin 1997-98; digital data files
D. L. Daniels, S. W. Nicholson, W.F. Cannon
1999, Open-File Report 99-28
No abstract available....
Trends in base flows and extreme flows in the Beaver Kill Basin, Catskill Mountains, New York, 1915-94
Barry P. Baldigo
1999, Open-File Report 98-65
Long-term records from five streamflow-gaging stations within and near the 300-square mile Beaver Kill Basin were analyzed to determine whether construction and presence of New York State Route 17 (NY 17), which was completed in the late 1960's, could have altered hydrologic processes in the basin and thereby adversely affected...
Lithology and aggregate quality attributes for the digital geologic map of Colorado
Daniel H. Knepper, Gregory N. Green, William H. Langer
1999, Open-File Report 99-29
This geologic map was prepared as a part of a study of digital methods and techniques as applied to complex geologic maps. The geologic map was digitized from the original scribe sheets used to...
Standardization and calibration of heated mounts illustrated with day-old mallard ducklings
G.S. Bakken, P.S. Reynolds, K.P. Kenow, C. E. Korschgen, A.F. Boysen
1999, Physiological and Biochemical Zoology (72) 502-506
No abstract available. ...
Distributions of uronic acids and O-methyl sugars in sinking and sedimentary particles in two coastal marine environments
Brian A. Bergamaschi, Jeffrey S. Walters, J. I. Hedges
1999, Geochimica et Cosmochimica Acta (63) 413-425
Although recent research has indicated that bacteria may contribute an important fraction of biochemical residues in terrestrial and marine environments, it is difficult for geochemists to identify contributions from these ubiquitous and biochemically diverse organisms. Previous studies have suggested uronic acids and O-methyl sugars may be useful indicators of microbial abundance...
New strategy needed in earthquake, volcano monitoring
Wayne R. Thatcher
1999, Eos Science News (80) 330-331
Recent advances in space geodesy provide unprecedented opportunities for measuring and understanding processes related to earthquake occurrence and volcanic eruptions in the United States and elsewhere. The Global Positioning System (GPS) uses Earth-orbiting satellites to obtain relative movements of ground points accurate to a few millimeters, either through periodically repeated...
Dietary and culture influences on macrophage aggregate parameters in gilthead seabream (Sparus aurata) juveniles
D. Montero, V. S. Blazer, J. Socorro, M. S. Izquierdo, L. Tort
1999, Aquaculture (179) 523-534
Macrophage aggregates (MAs) are structures in the spleen, kidney and sometimes liver of fishes which have various functions such as recycling/storing/detoxification of cellular wastes and exogenous substances. They have been also reported to be important in the specific immune response and are used as health indicators. Changes in MA density,...
Late Cenozoic stratigraphy and tephrochronology of the western Black Mountains piedmont, Death Valley, California: Implications for the tectonic development of Death Valley
Jeffrey R. Knott, Andrei M. Sarna-Wojcicki, C.E. Meyer, John Tinsley, S. G. Wells, Elmira Wan
1999, GSA Special Papers (333) 345-366
Geologic mapping combined with the tephrochronology of spatially isolated sedimentary sections along the western Black Mountains piedmont adjacent the Death Valley fault zone (DVFZ) improves the late Cenozoic stratigraphy from relative age to correlated age. Pliocene tephra layers identified in Funeral Formation conglomerates at Artist Drive and Copper Canyon include...
