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Ecological data collected in the Santee River basin and coastal drainages, North and South Carolina, 1996–98
Thomas A. Abrahamsen
2001, Open-File Report 2001-352
As part of the National Water-Quality Assessment Program, ecological investigations were conducted in 23 reaches of 16 streams in the Santee River Basin and Coastal Drainages study unit in North and South Carolina during 1996-98. Habitat characteristics, such as stream width and depth, bank composition, bank vegetative cover, stream shading...
Catalog of earthquake hypocenters at Alaskan volcanoes: January 1, 1994 through December 31, 1999
Arthur D. Jolly, Scott D. Stihler, John A. Power, John C. Lahr, John Paskievitch, Guy Tytgat, Steve Estes, Andrew B. Lockhart, Seth C. Moran, Stephen R. McNutt, William R. Hammond
2001, Open-File Report 2001-189
The Alaska Volcano Observatory (AVO), a cooperative program of the U.S. Geological Survey, the Geophysical Institute of the University of Alaska - Fairbanks, and the Alaska Division of Geological and Geophysical Surveys, has maintained a seismic monitoring program at potentially active volcanoes in Alaska since 1988 (Power and others, 1993;...
Technology advancement: A factor in increasing resource use
David R. Wilburn, Thomas G. Goonan, Donald I. Bleiwas
2001, Open-File Report 2001-197
The specter of mineral resource scarcity has been repeatedly raised as a concern because ever-growing populations with seemingly insatiable appetites for minerals place claims against a finite resource endowment. This report analyzes how technology has helped to ease resource constraints, and uses case studies of aluminum, copper, potash, and sulfur...
Configuration of the Seattle Urban Seismic Array for the February 28, 2001, M6.8, Nisqually earthquake and its aftershocks
David Carver, A.D. Frankel, W.T. Bice, B. Norris, N. Dickman
2001, Open-File Report 2001-344
This is a description of the configuration of the Seattle Urban Seismic Array (click on thumbnail map to see full size map) at the time of the Nisqually earthquake and its aftershocks (from April 28 through March 3, 2001). The array is operated by the Geologic Hazards Team of the U. S...
A procedural manual for measurement of uranium and thorium isotopes utilizing the USGS-Stanford Finnegan Mat 262
Donald D. Shamp
2001, Open-File Report 2001-333
Over the past several decades investigators have extensively examined the 238U-234U- 230Th systematics of a variety of geologic materials using alpha spectroscopy. Analytical uncertainty for 230Th by alpha spectroscopy has been limited to about 2% (2σ). The advantage of thermal ionization mass spectroscopy (TIMS), introduced by Edwards and co-workers in...
The Silent Canyon caldera — A three dimensional model as part of a Pahute Mesa - Oasis Valley, Nevada, hydrogeologic model
Edwin H. McKee, Geoffery A. Phelps, Edward A. Mankinen
2001, Open-File Report 2001-297
A 3-dimensional caldera model based on gravity inversion, drill-hole data, and geologic mapping offers the framework for a hydrogeologic evaluation of the Silent Canyon caldera in the central part of Pahute Mesa, Nevada. It has been recognized for several decades that the central part of Pahute Mesa is the site of...
Spatial variability of sediment erosion processes using GIS analysis within watersheds in a historically mined region, Patagonia Mountains, Arizona
Laura M. Brady, Floyd Gray, Craig A. Wissler, D. Phillip Guertin
2001, Open-File Report 2001-267
In this study, a geographic information system (GIS) is used to integrate and accurately map field studies, information from remotely sensed data, watershed models, and the dispersion of potentially toxic mine waste and tailings. The purpose of this study is to identify erosion rates and net sediment delivery of soil...
Multibeam mapping of the major deltas of southern Puget Sound, Washington
James V. Gardner, E. J. van den Ameele, Peter Dartnell
2001, Open-File Report 2001-266
A magnitude 6.8 earthquake struck southern Puget Sound, Washington, USA on February 28, 2001 causing an estimated $0.7 billion to $1.4 billion in damages to the surrounding area (Williams et al, 2001). The epicenter was close to the Nisqually delta, one of three major deltas in southern Puget Sound (Figure...
Petrography and physical properties of selected rock types associated with the Hayward Fault, California
Diane E. Moore, David A. Ponce
2001, Open-File Report 2001-263
This report provides brief petrographic descriptions of rock samples collected from the vicinity of the Hayward Fault, Northern California. Two groups of rock samples are represented here: A set of six samples that were used for laboratory measurements of P- and S-wave velocity , strength, density, and porosity. This group was...
Metal loading assessment of a small mountainous sub-basin characterized by acid drainage -- Prospect Gulch, upper Animas River watershed, Colorado
Laurie Wirt, Kenneth J. Leib, Roger Melick, Dana J. Bove
2001, Open-File Report 2001-258
strongly affected by natural acidity from pyrite weathering. Metal content in the water column is a composite of multiple sources affected by hydrologic, geologic, climatic, and anthropogenic conditions. Identifying sources of metals from various drainage areas was determined using a tracer injection approach and synoptic sampling during low flow conditions on September 29, 1999 to determine...
Eagle Mountain Mine: Geology of the former Kaiser Steel Operation in Riverside County, California
Eric R. Force
2001, Open-File Report 2001-237
This investigation of the Eagle Mountain Mine area, though cursory, revealed new structural, alteration, and stratigraphic relations. Eagle Mountain ores were previously an important source of iron to the western U. S. Ore (where fresh) is magnetite-pyrite rock forming two stratabound horizons virtually continuous for 11 km. Gneissic basement rocks are...
Iron and steel recycling in the United States in 1998
Michael D. Fenton
2001, Open-File Report 2001-224
Consumption of iron and steel scrap and the health of the scrap industry depend directly on the health of the steelmaking industry. The United States, as well as most of the world, is expected to consume increasing amounts of scrap as a steadily increasing population demands more steel products. World...
Resource materials for a GIS spatial analysis course
Gary L. Raines
2001, Open-File Report 2001-221
This report consists of materials prepared for a GIS spatial analysis course offered as part of the Geography curriculum at the University of Nevada, Reno and the University of California at Santa Barbara in the spring of 2000. The report is intended to share information with instructors preparing spatial-modeling training...
Geologic map of the Lockwood Valley Quadrangle, Ventura County, California
Karl S. Kellogg
2001, Open-File Report 99-130
The Lockwood Valley quadrangle is located in the western Transverse Ranges of California, about 10 km southwest of Frazier Park. It includes the western flank of Frazier Mountain, southern Lockwood Valley, and a region of the Los Padres National Forest near northern Piru Creek....
Evaluation of the location and recency of faulting near prospective surface facilities in Midway Valley, Nye County, Nevada
F. H. Swan, J. R. Wesling, M. M. Angell, A. P. Thomas, J.W. Whitney, J. D. Gibson
2001, Open-File Report 2001-55
Evaluation of surface faulting that may pose a hazard to prospective surface facilities is an important element of the tectonic studies for the potential Yucca Mountain high-level radioactive waste repository in southwestern Nevada. For this purpose, a program of detailed geologic mapping and trenching was done to obtain surface and...