Joyce E. Williamson
2000, Open-File Report 2000-430
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Page 1142, results 28526 - 28550
Publication Extents
Not all publications have extents, not all extents are completely accurateL. A. Mayer, M. Paton, L. Gee, S. V. Gardner, C. Ware
2000, Conference Paper, OCEANS 2000 MTS/IEEE conference and exhibition. Conference proceedings
Recent years have seen remarkable advances in sonar technology, positioning capabilities, and computer processing power that have revolutionized the way we image the seafloor. The massive amounts of data produced by these systems present many challenges but also offer tremendous opportunities in terms of visualization and analysis. The authors have...
James F. Ruhl, Alison L. Fong, Paul E. Hanson, William J. Andrews
2000, Water-Resources Investigations Report 2000-4107
The quality of shallow ground water in a 75-mi2 agricultural area of the Anoka Sand Plain aquifer in central Minnesota is described as part of the National Water Quality Assessment (NAWQA) Program - a national-scale assessment of the quality of water resources within large study units in various hydrologic settings....
James D. Fallon, Ryan P. McNellis
2000, Water-Resources Investigations Report 2000-4165
The U.S. Geological Survey sampled snowmelt runoff from 42 stream sites during March and April 1997 in part of the Upper Mississippi River Basin, Minnesota and Wisconsin, to characterize nutrient and suspended-sediment concentrations, yields, and loads. Ancillary data from 12 sites provided data to estimate constituent loads delivered during snowmelt...
Gregory A. Payne
2000, Water-Resources Investigations Report 2000-4281
Water-quality samples were collected during July 1999 from selected lakes and bays, and the mouths of two rivers that flow into Voyageurs National Park in northern Minnesota. Results of laboratory analyses and field measurements of chemical and physical properties were compared to similar data collected during 1977-83. Water-quality data were...
Gabriel Paris, Michael N. Machette, Richard L. Dart, Kathleen M. Haller
2000, Open-File Report 2000-284
As part of the International Lithosphere Program’s “World Map of Major Active Faults,” the U.S. Geological Survey (USGS) is assisting in the compilation of a series of digital maps of Quaternary faults and folds in Western Hemisphere countries. The maps show the locations, ages, and activity rates of major earthquake-related...
Cindy L. Gillespie, V. J. S. Grauch, Kim Oshetski, Gordon R. Keller
2000, Open-File Report 2000-490
Principal facts for 156 new gravity stations in the southern Albuquerque basin are presented. These data fill a gap in existing data coverage. The compilation of the new data and two existing data sets into a regional data set of 5562 stations that cover the Albuquerque basin and vicinity is also described. Bouguer...
S. E. Church, D.L. Fey, D.M. Unruh, R. B. Vaughn, J.E. Taggart Jr.
2000, Open-File Report 2000-244
Eric M. Sadorf, S. Michael Linhart
2000, Water-Resources Investigations Report 2000-4106
The quality of shallow alluvial ground water that is used for domestic supplies in the Wapsipinicon, Cedar, Iowa, and Skunk River Basins (Eastern Iowa Basins) is described. Water samples from 32 domestic-supply wells were collected from June through July 1998. This study of ground-water quality in alluvial aquifers in the...
R. W. Saltus, Adrienne Barnett
2000, Open-File Report 2000-365
A 3-dimensional model (Figure 1) of the interaction of oceanic and continental tectonic plates along the eastern portion of the Aleutian volcanic arc helps in the visualization of basic tectonic, geodetic, and geophysical data in this active plate boundary region. The model is constrained by topographic, bathymetric, and seismic data...
Alissa Coes, Dorinda J. Gellenbeck, Douglas C. Towne, Maureen C. Freark
2000, Water-Resources Investigations Report 2000-4117
Fifty-eight ground-water samples were collected and analyzed in 1998 by the U.S. Geological Survey and the Arizona Department of Environmental Quality to assess ground-water quality and to identify factors affecting ground-water quality in the Upper Santa Cruz Basin. In addition, pre-existing groundwater quality data for six wells were analyzed to determine changes in...
Jonathan R. Childs, Patrick Hart, Terry R. Bruns, Michael S. Marlow, Ray Sliter
2000, Open-File Report 2000-494
Between 1993 and 1997, the U.S. Geological Survey acquired high-resolution, marine seismic-reflection profile data across submerged portions of known and inferred upper crustal fault zones throughout the greater San Francisco Bay area. Surveys were conducted oversouth San Francisco Bay in the vicinity of the San Bruno shoal (roughly between the...
Edward Gray Jensen
2000, Open-File Report 2000-379
The Earthworm system is a seismic network data acquisition and processing system used by the Northern California Seismic Network as well as many other seismic networks. The input to the system is comprised of many realtime electronic waveforms fed to a multi-channel digitizer on a PC platform. The digitizer consists...
James V. Gardner, Larry A. Mayer, Mark W. Buktenica
2000, Open-File Report 2000-405
During the Spring of 1999, the US Geological Survey (USGS) Pacific Seafloor Mapping Project (PSMP) was contacted by the US National Park Service Crater Lake National Park (CLNP) to inquire about the plausibility of producing a high-resolution multibeam bathymetric map of Crater Lake. The purpose was to generate a much...
C.S. Rombach
2000, Open-File Report 2000-289
No abstract available....
C. E. Cameron
2000, Open-File Report 2000-290
No abstract available....
Joe Britton
2000, Open-File Report 2000-291
No abstract available....
D.W. Valentine, J.N. Densmore, D. L. Galloway, Falk Amelung
2000, Open-File Report 2000-447-A
The population in San Luis Obispo County has grown steadily during the 1990s, and some land use has been converted from dry farming to grazing to irrigated vineyards and urban areas. Because insufficient surface-water supplies are available to meet the growing demand, ground-water pumpage has increased and the resulting water-level...
Joe Britton
2000, Open-File Report 2000-357
No abstract available....
Steven H. Pilcher
2000, Open-File Report 2000-130
Descriptions of the mineral occurrences can be found in the report. See U.S. Geological Survey (1996) for a description of the information content of each field in the records. The data presented here are maintained as part of a statewide database on mines, prospects and mineral occurrences throughout Alaska....
John A. Izbicki, Dennis A. Clark, Maria I. Pimental, Michael Land, John C. Radyk, Robert L. Michel
2000, Open-File Report 2000-262
This report presents data on the physical properties of unsaturated alluvial deposits and on the chemical and isotopic composition of soil water and soil gas collected at 12 monitoring sites in the western part of the Mojave Desert, near Victorville, California. Sites were installed using the ODEX air-hammer method. Seven...
Thomas M. Brocher, Thomas L. Pratt, Kate C. Miller, Anne M. Trehu, Catherine M. Snelson, Craig S. Weaver, Ken C. Creager, Robert S. Crosson, Uri S. ten Brink, Marcos G. Alvarez, Steven H. Harder, Isa Asudeh
2000, Open-File Report 2000-318
This report describes the acquisition, processing, and quality of seismic reflection and refraction data obtained in the Seattle basin, central Puget Lowland, western Washington, in September 1999 during the Seismic Hazards Investigation of Puget Sound (SHIPS). As a sequel to the 1998 SHIPS air gun experiment (also known as 'Wet...
Richard J. Reynolds
2000, Open-File Report 99-468
The U.S. Geological Survey?s Federal-State cooperative observation well network in upstate New York was evaluated in terms of areal coverage, objectives, and short- and long-term expansion plans. This report presents a history of the observation well network in upstate New York and depicts, on maps, the distribution of observation wells with respect to climatic regions, physiographic regions,...
Blakemore E. Thomas, Margot Truini
2000, Open-File Report 2000-453
The N aquifer is the major source of water in the 5,400-square-mile area of Black Mesa in northeastern Arizona. Availability of water is an important issue in this area because of continued industrial and municipal use, a growing population, and a precipitation of only about 6 to 12 inches per...
Jerry W. Farrar, Ashley M. Copen
2000, Open-File Report 2000-398
This report presents the results of the U.S. Geological Survey's analytical evaluation program for six standard reference samples -- T-161 (trace constituents), M-154 (major constituents), N-65 (nutrient constituents), N-66 nutrient constituents), P-34 (low ionic strength constituents), and Hg-30 (mercury) -- that were distributed in March 2000 to 144 laboratories enrolled...