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Analysis of fixed-station water-quality data in the Umpqua River basin, Oregon
J. F. Rinella
1986, Water-Resources Investigations Report 85-4253
An appraisal of surface water quality in the Umpqua River basin was made using existing monthly data collected by the Oregon Department of Environmental Quality and the U.S. Geological Survey in cooperation with the Douglas County Water Resources Survey. This appraisal was limited to interpretation of instantaneous monthly water quality...
Directions and rates of ground-water movement in the vicinity of Kesterson Reservoir, San Joaquin Valley, California
R.J. Mandle, A.L. Kontis
1986, Water-Resources Investigations Report 86-4196
A three-dimensional groundwater flow model was used to simulate groundwater flow for a 124 sq mi area in the vicinity of Kesterson Reservoir in the San Joaquin Valley, California. Available data were used to calculate a probable range of groundwater flow rates, but calibration and sensitivity analysis were not done...
Summary geochemical maps for samples of rock, stream sediment, and nonmagnetic heavy-mineral concentrate, Sweetwater Roadless Area, Mono County, California and Lyon and Douglas Counties, Nevada
Maurice A. Chaffee
1986, Miscellaneous Field Studies Map 1535-C
The Sweetwater Roadless Area lies between Yerington, Nevada, and Bridgeport, California, along the California-Nevada boundary. The area encompasses approximately 72,240 acres in Toiyabe National Forest in Mono County, California, and Lyon and Douglas Counties, Nevada. This roadless area, which lies just east of the Sierra Nevada range, exhibits rugged topography. Elevations...
Seismic-reflection profiles of the New Madrid seismic zone-data along the Mississippi River near Caruthersville, Missouri
A. J. Crone, S.T. Harding, D. P. Russ, K. M. Shedlock
1986, Miscellaneous Field Studies Map 1863
The tectonic setting and the earthquake hazards of the New Madrid seismic zone in the northern Mississippi embayment have been the subject of intensive study the past several years as part of the Earthquake Hazard Reduction Program of the USGS (U.S. Geological Survey). These efforts have improved our knowledge of...
Metallogenic map of volcanogenic massive-sulfide occurrences in New Mexico
J. M. Robertson, M.S. Fulp, M.D. Daggett
1986, Miscellaneous Field Studies Map 1853-A
New Mexico volcanogenic massive-sulfide occurrences, which typically contain pyrite and pyrrhotite accompanied by variable amounts of base-metal sulfides and precious metals, are found within mainly subaqueous, compositionally bimodal metavolcanic successions of Early to Middle Proterozoic age that are exposed primarily in the north-central part of the state. Host rocks include...
Effect of urban stormwater runoff on ground water beneath recharge basins on Long Island, New York
H. F. Ku, D. L. Simmons
1986, Water-Resources Investigations Report 85-4088
Urban stormwater runoff was monitored during 1980-82 to investigate the source, type, quantity, and fate of contaminants routed to the more than 3,000 recharge basins on Long Island and to determine whether this runoff might be a significant source of contamination to the groundwater reservoir. Forty-six storms were monitored at...
Geophysical maps of the Dos Cabezas Mountains Wilderness Study Area, Cochise County, Arizona
G. A. Abrams
1986, Miscellaneous Field Studies Map 1873-A
The Dos Cabezas Mountains Wilderness Study Area, Arizona, lies along part of the crest and northeast flank of the Dos Cabezas Mountains, Cochise County, near the southeast corner of Arizona (fig. 1). The U.S. Bureau of Land Management requested mineral surveys of about 11,921 acres of the approximately 15,000 acre...
Water resources data, Montana, water year 1985; Volume 1. Hudson Bay Basin, Missouri River Basin
R.R. Shields, J. R. Knapton, M. K. White, T.M. Brosten, M.L. Kasman
1986, Water Data Report MT-85-1
The Water Resources Division of the U.S. Geological Survey, in cooperation with State and other Federal agencies, obtain a large amount of data pertaining to the water resources of Montana each water year. These data, accumulated during many water years, constitute a valuable data base for developing an improved under-standing...