EAST93: Geophysical traverse from the Transantarctic Mountains to the Wilkes Basin, East Antarctica
Uri S. ten Brink, Stephen Bannister
1995, Open-File Report 95-225
The East Antarctic Seismic Traverse (EAST93) was a geophysical traverse designed to image the bedrock under the East Antarctic ice cap. The traverse started 10 km west of the Taylor Dome drill site and 25 km west of the exposed bedrock of the Transantarctic Mountains at Lashly Mt. and ended...
Applying computer simulation models as learning tools in fishery management
Barry L. Johnson
1995, North American Journal of Fisheries Management (15) 736-747
Computer models can be powerful tools for addressing many problems in fishery management, but uncertainty about how to apply models and how they should perform can lead to a cautious approach to modeling. Within this approach, we expect models to make quantitative predictions but only after all model inputs have...
Activities to explore acid rain and building stones
Elaine S. McGee
1995, Open-File Report 95-566
Quaternary geology of the Granite Park area, Grand Canyon, Arizona; aggradation-downcutting cycles, calibration of soils stages, and response of fluvial system to volcanic activity, with an appendix synopsis of Granite Park archeology
Ivo Lucchitta, G.H. Curtis, M. E. Davis, S.W. Davis, B. D. Turrin, Christopher Coder
1995, Open-File Report 95-591
Land use, organochlorine compound concentrations, and trends in benthic-invertebrate communities in selected stream basins in Chester County, Pennsylvania
Mark A. Hardy, Kim L. Wetzel, Craig R. Moore
1995, Water-Resources Investigations Report 94-4060
Land use was analyzed for the drainage areas of 26 stream sites in Chester County, Pa., that cover a total area of 227 square miles or about 30 percent of the country. The most significant land-use changes during 1967-87 were decreased agricultural land use, increased residential land use, and increased...
Hydrogeology of post-Wilcox Group stratigraphic units in the area of the Naval Air Station Memphis, near Millington, Tennessee
James A. Kingsbury, J. K. Carmichael
1995, Water-Resources Investigations Report 95-4011
No abstract available. ...
Radiocarbon evidence for extensive plate-boundary rupture about 300 years ago at the Cascadia subduction zone
A.R. Nelson, B.F. Atwater, P.T. Bobrowsky, L. A. Bradley, J. J. Clague, G. A. Carver, M.E. Darienzo, W.C. Grant, H.W. Krueger, R. Sparks, Thomas W. Stafford Jr., M. Stuiver
1995, Nature (378) 371-374
The Cascadia subduction zone, a region of converging tectonic plates along the Pacific coast of North America, has a geological history of very large plate-boundary earthquakes1,2, but no such earthquakes have struck this region since Euro-American settlement about 150 years ago. Geophysical estimates of the moment magnitudes (Mw) of the...
Multiple-regression equations to estimate peak-flow frequency for streams in Hays County, Texas
Raymond M. Slade Jr., Gary D. Tasker, William H. Asquith
1995, Water-Resources Investigations Report 95-4019
No abstract available....
Digital aeromagnetic anomaly data from eastern-most Guyana
Herbert A. Pierce, Natalka Backjinski, John-James Manes
1995, Open-File Report 95-590
The Center for Inter-American Mineral Resource Investigations (CIMRI) supported distribution and analysis of geoscientific and mineral resource related information concerning Latin America. CIMRI staff digitized aeromagnetic data for eastern-most Guyana as part of a preliminary regional assessment of minerals in the Guyana Shield, South America. The data were digitized from...
Quality of water in the Red River alluvial aquifer, Pool 2, Red River waterway area, Ruby, Louisiana
C. W. Smoot, R. C. Seanor, G. F. Huff
1995, Water-Resources Investigations Report 94-4228
No abstract available....
Overview of environmental and hydrogeologic conditions at Iliamna, Alaska
James D. Hall
1995, Open-File Report 95-346
Data report for the 1993 Mendocino triple junction seismic experiment
N. J. Godfrey, B. C. Beaudoin, Christof Lendl, A.S. Meltzer, J.H. Luetgert
1995, Open-File Report 95-275
Ground-water flow, geochemistry, and effects of agricultural practices on nitrogen transport at study sites in the Piedmont and Coastal Plain physiographic provinces, Patuxent River Basin, Maryland
Randolph E. McFarland
1995, Open-File Report 94-507
The effects of agricultural practices on nitrogen transport were assessed at two 10-acre study sites in the Patuxent River Basin, Maryland, during 1986- 92. Nitrogen load was larger in ground water than in surface runoff at both sites. Denitrification and (or) long traveltimes of ground water at the study site...
Hydrogeology and deformation of sandbars in response to fluctuations in flow of the Colorado River in the Grand Canyon, Arizona
M. C. Carpenter, R. L. Carruth, J.B. Fink, J.K. Boling, B.L. Cluer
1995, Water-Resources Investigations Report 95-4010
Rill erosion, slumping, and fissuring develop on seepage faces of many sandbars along the Colorado River in the Grand Canyon. These processes, observed at low river stage, are a response to residual head gradients in the sandbars caused by the river-stage fluctuation. Three sandbars were instrumented with sensors for continual...
Water-quality assessment of the upper Illinois River Basin in Illinois, Indiana, and Wisconsin: Nutrients, dissolved oxygen, and fecal-indicator bacteria in surface water, April 1987 through August 1990
P. J. Terrio
1995, Water-Resources Investigations Report 95-4005
Data describing the presence, spatial distribution, and temporal variability of nutrients, dissolved oxygen, and fecal-indicator bacteria in surface water were collected from streams in the upper Illinois River Basin from 1987-90 as part of the U.S. Geological Survey's National Water-Quality Assessment (NAWQA) program. The largest concen- trations and loads of...
Stratigraphic identification of middle Tertiary ash-flow tuffs using trace-element abundances, Worthington Mountains, Nevada
E. A. Du Bray
1995, Open-File Report 95-545
Water budget and simulation of one-dimensional unsaturated flow for a flood- and a sprinkler-irrigated field near Milford, Utah
D. D. Susong
1995, Water-Resources Investigations Report 95-4072
Ground-water recharge to basin-fill aquifers from unconsumed irrigation water in the western United States is being reduced as irrigators convert to more efficient irrigation systems. In some areas, these changes in irrigation methods may be contributing to ground-water-level declines and reducing the quantity of water available to downgradient users. The...
Preliminary geologic map of the Little Piute Mountains, San Bernardino County, California
Keith A. Howard, Michael L. Dennis, Karl E. Karlstrom, Geoffrey A. Phelps
1995, Open-File Report 95-598
Introduction The Little Piute Mountains in the eastern Mojave Desert expose a series of folds and thrust faults involving metamorphosed Paleozoic strata (Miller and others, 1982; Stone and others, 1983). Detailed mapping of these structures was undertaken to help elucidate regional Mesozoic structural evolution. Earlier geologic maps were prepared by...
High resolution mapping of stratigraphy using seismic tomography; a feasibility test at the M-area basin, Savannah River Site, South Carolina
Karl J. Ellefsen
1995, Open-File Report 95-518
Overview of environmental and hydrogeologic conditions at Chandalar Lake, Alaska
James R. Cowan
1995, Open-File Report 95-348
Geohydrology of the Flints Pond Aquifer, Hollis, New Hampshire
Joseph D. Ayotte, Tracy H. Dorgan
1995, Open-File Report 95-363
Flints pond has been subjected to accelerated eutrophication as a result of watershed development (building of new homes and conversion of summer cottages into permanent homes) since the 1930's. Ground-water flow is the primary recharge and discharge mechanism for Flints Pond. The saturated thickness, transmissive properties, and altitude of the...
Results of geophysical surveys of glacial deposits near a former waste-disposal site, Nashua, New Hampshire
Joseph D. Ayotte, Tracy H. Dorgan
1995, Open-File Report 95-142
Geophysical investigations were done near a former waste-disposal site in Nashua, New Hampshire to determine the thickness and infer hydraulic characteristics of the glacial sediments that underlie the area. Approximately 5 miles of ground- penetrating radar (GPR) data were collected in the study area by use of dual-80 Megahertz antennas....
An evaluation of sand and gravel resources in and near the Verde Valley of the Coconino National Forest, Arizona
Leslie J. Cox
1995, Open-File Report 95-31
Simulation of hydrodynamics and solute transport in the Neuse River estuary
Jeanne C. Robbins, Jerad Bales
1995, Open-File Report 94-511
An investigation was conducted to characterize flow, circulation, and transport in the Neuse River estuary, North Carolina. The study included a detailed field-measurement program and the calibration, validation, and application of a physically realistic numerical model of hydro- dynamics and transport through a 40-kilometer reach of the estuary. Water level,...
Seismotectonic maps in the vicinity of New Madrid, Missouri — Database
B. S. Rhea
1995, Open-File Report 95-574
No abstract available....
