Skip to main content
U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Results

184563 results.

Alternate formats: RIS file of the first 3000 search results  |  Download all results as CSV | TSV | Excel  |  RSS feed based on this search  |  JSON version of this page of results

Page 2823, results 70551 - 70575

Show results on a map

Publication Extents

Not all publications have extents, not all extents are completely accurate
Beaufortian stratigraphic plays in the National Petroleum Reserve - Alaska (NPRA)
David W. Houseknecht
2003, Open-File Report 2003-40
The Beaufortian megasequence in the National Petroleum Reserve in Alaska (NPRA) includes Jurassic through lower Cretaceous (Neocomian) strata of the Kingak Shale and the overlying pebble shale unit. These strata are part of a composite total petroleum system involving hydrocarbons expelled from source rocks in three stratigraphic intervals, the...
Occurrence of the diamondback terrapin (Malaclemys terrapin littoralis) at South Deer Island in Galveston Bay, Texas, April 2001-May 2002
Jennifer L. Hogan
2003, Open-File Report 2003-22
One-hundred thirty-five terrapins were captured (116 individuals, 19 recaptures) in occurrence and nesting and basking surveys at South Deer Island in Galveston Bay, Texas, during April 2001–May 2002. Along the southern shore of the island, terrapins were captured in crab traps placed in shallow water offshore; in the lagoon on...
Results of elemental and stable isotopic measurements, and dietary composition of Arctic grayling (Thymallus arcticus) collected in 2000 and 2001 from the Fortymile River Watershed, Alaska
J.G. Crock, R.R. Seal II, L. P. Gough, P. Weber-Scannell
2003, Open-File Report 2003-57
We report the results of the elemental and stable isotopic analyses, as well as the composition of stomach contents, of Arctic grayling (Thymallus arcticus), an ecologically important resident freshwater sport and subsistence fish in the Fortymile River Mining District of the Interior Highlands Ecoregion in eastern Alaska. These data are...
Results of the U.S. Geological Survey's analytical evaluation program for standard reference samples distributed in September 2002
Mark T. Woodworth, Brooke F. Connor
2003, Open-File Report 2002-481
This report presents the results of the U.S. Geological Survey's analytical evaluation program for six standard reference samples -- T-171 (trace constituents), M-164 (major constituents), N-75 (nutrient constituents), N-76 (nutrient constituents), P-39 (low ionic-strength constituents), and Hg-35 (mercury) -- that were distributed in September 2002 to laboratories enrolled in the...
Regional sediment budget of the Columbia River littoral cell, USA: Analysis of bathymetric- and topographic-volume change
Maarten C. Buijsman, C. R. Sherwood, A. E. Gibbs, G. Gelfenbaum, G. M. Kaminsky, P. Ruggiero, J. Franklin
2003, Open-File Report 2002-281
In this Open-File Report we present calculations of changes in bathymetric and topographic volumes for the Grays Harbor, Willapa Bay, and Columbia River entrances and the adjacent coasts of North Beach, Grayland Plains, Long Beach, and Clatsop Plains for four intervals: pre-jetty - 1920s (Interval 1), 1920s - 1950s (Interval...
Hydrologic properties and ground-water flow systems of the Paleozoic rocks in the upper Colorado River basin in Arizona, Colorado, New Mexico, Utah, and Wyoming, excluding the San Juan Basin
Arthur L. Geldon
2003, Professional Paper 1411-B
The hydrologic properties and ground-water flow systems of Paleozoic sedimentary rocks in the Upper Colorado River Basin were investigated under the Regional Aquifer-System Analysis (RASA) program of the U.S. Geological Survey in anticipation of the development of water supplies from bedrock aquifers to fulfill the region's growing water demands. The...
Monitoring vegetation phenology using MODIS
Xiayong Zhang, Mark A. Friedl, Crystal B. Schaaf, Alan H. Strahler, John C.F. Hodges, Feng Gao, Bradley C. Reed, Alfredo Huete
2003, Remote Sensing of Environment (84) 471-475
Accurate measurements of regional to global scale vegetation dynamics (phenology) are required to improve models and understanding of inter-annual variability in terrestrial ecosystem carbon exchange and climate–biosphere interactions. Since the mid-1980s, satellite data have been used to study these processes. In this paper, a new methodology to monitor global vegetation...
Effects of landscape characteristics on land-cover class accuracy
Jonathan H. Smith, Stephen V. Stehman, James D. Wickham, Limin Yang
2003, Remote Sensing of Environment (84) 342-349
The effects of patch size and land-cover heterogeneity on classification accuracy were evaluated using reference data collected for the National Land-Cover Data (NLCD) set accuracy assessment. Logistic regression models quantified the relationship between classification accuracy and these landscape variables for each land-cover class at both the Anderson Levels I and...
Irrigation-induced contamination of water, sediment, and biota in the western United States-synthesis of data from the National Irrigation Water Quality Program
Ralph L. Seiler, Joseph P. Skorupa, David L. Naftz, B. Thomas Nolan
2003, Professional Paper 1655
In October 1985 the U.S. Department of the Interior (DOI), through the National Irrigation Water Quality Program (NIWQP), began a series of field investigations at 26 areas in the Western United States to determine whether irrigation drainage has had harmful effects on fish, wildlife, and humans or has reduced beneficial...
Alaska resource data file: Valdez quadrangle
Travis L. Hudson
2003, Open-File Report 2003-30
The data presented here are maintained as part of a statewide database on mines, prospects and mineral occurrences throughout Alaska....
Arsenic in New England: Mineralogical and geochemical studies of sources and enrichment pathways
Robert A. Ayuso, Nora K. Foley
2003, Open-File Report 2002-454
Detailed mineralogical, geochemical and radiogenic isotopic studies of iron-sulfide and secondary iron oxy-hydroxide minerals in natural bedrock in coastal Maine and New Hampshire test the link between arsenic-rich sulfide minerals in bedrock and secondary oxy-hydroxide minerals. Samples were selected from over 70 bedrock localities, including 22 within the regionally extensive...
Case study for delineating a contributing area to a well in a fractured siliciclastic-bedrock aquifer near Lansdale, Pennsylvania
Gary J. Barton, Dennis W. Risser, Daniel G. Galeone, Daniel J. Goode
2003, Water-Resources Investigations Report 2002-4271
A supply well used by the North Penn Water Authority near Lansdale, Pa., was selected as a case study for delineating a contributing area in a fractured siliciclastic-bedrock aquifer. The study emphasized the importance of refining the understanding of factors that control ground-water movement to the well by conducting (1)...
Methods for quality-assurance review of water-quality data in New Jersey
G. Allan Brown, Edward A. Pustay, Jacob Gibs
2003, Open-File Report 2002-383
This report is an instructional and reference manual that describes methods developed and used by the U.S. Geological Survey (USGS), New Jersey District, to assure the accuracy and precision of the results of analyses of surface- and ground-water samples received from analyzing laboratories and, ultimately, to ensure the integrity of...
Stratigraphic inferences derived from borehole data of Tertiary basin-filling rocks of the Pahrump Valley basin, Nevada and California
Donald S. Sweetkind, Emily Taylor, Heather Putnam
2003, Open-File Report 2003-51
This report summarizes the results from the compilation and interpretation of lithologic information from 266 driller?s logs from the Pahrump Valley, NV-CA. Borehole records for the Pahrump Valley were selected from a total of several thousand available well logs as those having lithologic data and high confidence in the well...