Hydrology of the Wolf Branch sinkhole basin, Lake County, east-central Florida
D. M. Schiffer
1996, Open-File Report 96-143
A 4-year study of the hydrology of the Wolf Branch sinkhole basin in Lake County, Florida, was conducted from 1991-95 by the U.S. Geological Survey to provide information about the hydrologic characteristics of the drainage basin in the vicinity of Wolf Sink. Wolf Branch drains a 4.94 square mile area...
Energy and mineral resource assessment of the Ashland Division of the Custer National Forest, Powder River and Rosebud Counties, southeastern Montana
B. S. Van Gosen
1996, Open-File Report 96-45
Spectral analysis workshop on the use of vegetation as an indicator of environmental contamination; proceedings of a workshop
Judith Lancaster
N.M. Milton, editor(s)
1996, Open-File Report 96-36
Global volcanic earthquake swarm database 1979-1989
J.P. Benoit, S.R. McNutt
1996, Open-File Report 96-69
Earthquake swarms are pervasive at volcanoes, but have seldom been studied systematically. Most swarms that are described in the literature are those that occurred in association with eruptions; indeed, earthquake swarms are the most reliable method of forecasting eruptions. For the purpose of this report, a swarm is defined as...
Geologic map of slump-block deposits in part of the Grand Mesa area, Delta and Mesa counties, Colorado
R.L. Baum, J. K. Odum
1996, Open-File Report 96-17
Resource assessment of the Bureau of Land Management's Winnemucca District and Surprise Resource Area, Northwest Nevada and Northeast California; geochemical analysis and thermochronologic modeling to evaluate conceptual petroleum plays
C.E. Barker
1996, Open-File Report 96-51
Inventory, characterization, and water quality of springs, seeps, and streams near Midnite Mine, Stevens County, Washington
K. C. Ames, N.P. Matson, D.M. Suzuki, P.B. Sak
1996, Open-File Report 96-115
The characterization of USGS gold reference standard, DGPM-1
D. J. Grimes, K. C. Stewart, S. A. Wilson, E.L. Kretschmer
1996, Open-File Report 96-58
Summary of suspended-solids concentration data, San Francisco Bay, California, water year 1994
P.A. Buchanan, D. H. Schoellhamer, R.C. Sheipline
1996, Open-File Report 95-776
Suspended-solids concentration data were collected in San Francisco Bay during water year 1994. Optical backscatterance sensors and water samples were used to monitor suspended solids continuously at two sites in Suisun Bay, two sites in Central San Francisco Bay, and three sites in South San Francisco Bay. Sensors were positioned...
Automated, colorimetric methods for determination of nitrate plus nitrite, nitrite, ammonium and orthophosphate ions in natural water samples
Ronald C. Antweiler, Charles J. Patton, Howard E. Taylor
1996, Open-File Report 93-638
The apparatus and methods used for the automatic, colorimetric determinations of dissolved nutrients (nitrate plus nitrite, nitrite, ammonium and orthophosphate) in natural waters are described. These techniques allow for the determination of nitrate plus nitrite for the concentration range 0.02 to 8 mg/L (milligrams per liter) as N (nitrogen); for...
Hydrothermal alteration mineralogy of SOH drill holes, Kilauea East Rift Zone geothermal area, Hawaii
Keith E. Bargar, Terry E.C. Keith, Frank A. Trusdell, S.R. Evans, M.L. Sykes
1996, Open-File Report 96-10
Thirty-eight hydrothermal minerals were identified from 356 drill-core specimens that were obtained from three Scientific Observation Holes (SOH-1, SOH-2, and SOH-4) drilled along the lower East Rift Zone (ERZ) of Kilauea Volcano, Hawaii. The minerals formed during alteration of basaltic rocks and glass by hot, circulating, waters in aquifers consisting...
Digital bedrock geologic map of the Saxtons River 7.5 x 15 minute quadrangle, Vermont
N. M. Ratcliffe, T. R. Armstrong
1996, Open-File Report 96-52-B
Well-construction, water-level, and water-quality data for ground-water monitoring wells for the J4 hydrogeologic study, Arnold Air Force Base, Tennessee
C.J. Haugh
1996, Open-File Report 95-763
Between December 1993 and March 1994, 27 wells were installed at 12 sites near the J4 test cell at Arnold Engineering Development Center in Coffee County, Tennessee. The wells ranged from 28 to 289 feet deep and were installed to provide information on subsurface lithology, aquifer characteristics, ground-water levels, and...
Active-, inactive-, and abandoned-mine information and selected geochemical data for the State of Nevada
Jean L. Ryder
1996, Open-File Report 96-61
Status of ground-water resources at U.S. Navy Support Facility, Diego Garcia; summary of hydrologic and climatic data, January 1993 through September 1995
J.D. Torikai
1996, Open-File Report 96-165
This report contains hydrologic and climatic data that describe the status of ground-water resources at U.S. Navy Support Facility, Diego Garcia. Data presented are from January 1993 through September 1995, although the report focuses on hydrologic events from July through September 1995. Cumulative rainfall for July through September 1995 was...
Water-quality data of stormwater runoff from Davenport, Iowa, 1992 and 1994
B.D. Schaap, R.F. Einhellig
1996, Open-File Report 95-759
The Water Quality Act of 1987 required the U.S. Environmental Protection Agency to regulate stormwater discharges under the National Pollutant Discharge Elimination System program, and guidelines for obtaining permits under this program were established for areas served by municipal separate storm sewer systems with populations greater than 100,000 (U.S. Environmental...
Digital bedrock geologic map of the Rochester quadrangle, Vermont
Gregory J. Walsh, Christine K. Falta
1996, Open-File Report 96-33-B
Nutrient and trace-element enrichment of Coeur d'Alene Lake, Idaho
P. F. Woods, M.A. Beckwith
1996, Open-File Report 95-740
The limnological characteristics and geochemistry of lakebed sediments in Coeur d'Alene Lake, a 129-square-kilometer, natural lake in northern Idaho, were assessed during 1991-92 because of the possible interaction of nutrient enrichment with the highly enriched trace-element concentrations stored in the lakebed. The lake was classified as oligotrophic during 1991-92 on...
Statistical and descriptive summaries of water-resources data for the Cannonball River basin, North Dakota and South Dakota
Edwin A. Wesolowski, S.D. Zainhofsky, Valerie M. Dressler
1996, Open-File Report 96-108
Existing hydrologic data and information for the Cannonball River Basin were compiled by the U.S. Geological Survey in cooperation with the Bureau of Reclamation. This report presents a summary of surface-water quality and streamflow data, ground-water quality data, ground-water level data, water-use data, and other information compiled from the U.S....
Hydrologic data for the East Poplar oil field, Fort Peck Indian Reservation, Northeastern Montana
J.N. Thamke, S. D. Craigg, T.M. Mendes
1996, Open-File Report 95-749
This report presents selected hydrologic data for the East Poplar oil field, located in the south-central part of the Fort Peck Indian Reservation in northeastern Montana. Data about the occurrence, quantity, and quality of ground and surface water are presented in tabular form. The tables contain records of privately owned...
Chemical analyses of ground-water samples from the Rio Grande Valley in the vicinity of Albuquerque, New Mexico, October 1993 through January 1994
D. W. Wilkins, J.L. Schlottmann, D. M. Ferree
1996, Open-File Report 95-773
A study was conducted to investigate general ground-water- quality conditions and contaminant locations in the Rio Grande Valley in the vicinity of Albuquerque, New Mexico. Water samples from 36 observation wells in 12 well nests were analyzed. The well nests are located along three roads near the Rio Grande--two...
A guide to safe field operations
D. K. Yobbi, T.H. Yorke, R.T. Mycyk
1996, Open-File Report 95-777
Most functions of the U.S. Geological Survey (USGS), Water Resources Division (WRD) require employees to participate in numerous field activities ranging from routine meetings with cooperators, other federal and public officials, and private citizens to potentially hazardous assignments, such as making flood measurements and scuba diving to service underwater instruments....
Storage capacity, detention time, and selected sediment deposition characteristics for Gull and Silver Lakes, Mono County, California
J. C. Blodgett
1996, Open-File Report 95-702
Bathymetric surveys made in September 1994 indicate the maximum storage capacity of Gull and Silver Lakes, California, is about 2,400 and 3,000 acre-feet, respectively. During March through October 1994, the lake level dropped 0.7 feet at both Gull Lake and Silver Lake. The associated change in storage was 60...
Stratigraphic study of Elk Park wetland, Gilpin County, Colorado
Eric D. McCafferty, Douglass E. Owen
1996, Open-File Report 95-818
Geologic map of the Silver Bell and West Silver Bell mountains, southern Arizona
David A. Sawyer
1996, Open-File Report 96-6
The Silver Bell Mountains, 50 km northwest of Tucson, Arizona, are a mountain range in the transition from the higher-relief mountains of southeastern Arizona to the low-relief ranges of the western Arizona deserts. The Silver Bell Mountains include the area of the Silver Bell mining district (Richard and Courtright, 1966)...
