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Page 5697, results 142401 - 142425

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Detection and mapping of hydrothermally altered rocks in the vicinity of the Comstock Lode, Virginia Range, Nevada, using enhanced Landsat images
Roger P. Ashley, Alexander F.H. Goetz, L. C. Rowan, M. J. Abrams
1979, Open-File Report 79-960
The Virginia Range, immediately southeast of Reno, Nev., consists mainly of flows, breccias, and turfs of Miocene age. Most of these volcanic rocks are of intermediate composition; rhyodacite is the most common rock type. Basalt, rhyolite and rhyolite tuff, and tuffaceous sedimentary rocks of Miocene and Pliocene age also cover...
Magnitudes, nature, and effects of point and nonpoint discharges in the Chattahoochee River Basin, Atlanta to West Point Dam, Georgia
J. K. Stamer, Rodney N. Cherry, R.E. Faye, R.L. Kleckner
1979, Water Supply Paper 2059
During the period April 1975 to June 1978, the U.S. Geological Survey conducted a river-quality assessment of the Upper Chattahoochee River basin in Georgia. One objective of the study was to assess the magnitudes, nature, and effects of point and non-point discharges in the Chattahoochee River basin from Atlanta to...
1980 water quality laboratory services catalog
L.C. Friedman, W.A. Beetem
1979, Open-File Report 79-697
The information in this catalog is provided to assist Water Resources Division personnel in the selection of analytical determinations, estimation of cost, calculation of sample volume requirements, identification of the necessary sample treatment, and selection of laboratory precision for samples to be submitted to Central Laboratories. The catalog contains 18...
Background information to accompany folio of geologic, mineral resource, geochemical, aeromagnetic, and gravity maps of the Hillsboro and San Lorenzo quadrangles, Sierra and Grant Counties, New Mexico, with sections on geochemistry and geophysics
David Carl Hedlund, K. C. Watts, Henry V. Alminas, Jeffrey C. Wynn
1979, Circular 808
The Hillsboro and San Lorenzo 15-minute quadrangles of southwestern New Mexico have been mapped at a 1:48,000 scale and selected mineralized areas within these quadrangles have been mapped in greater detail. This area of about 550 mi2 (1,424 km2) is within the southern part of the Black Range and includes...
Digital model of the Hollister Valley ground-water basin, San Benito County, California
G.W. Kapple
1979, Water-Resources Investigations Report 79-32
A two-dimensional finite-difference digital model was constructed to simulate effects of proposed pumping and recharge schemes on water levels in the Hollister Valley ground-water basin. Pumping rates in the valley are expected to increase from 24,000 acre-feet per year in 1968 to an ultimate rate of 38,500 acre-feet per year....
Aeromagnetic map and associated depth map of the Upper Mississippi Embayment region
T.G. Hildenbrand, R.P. Kucks, M. F. Kane, J. D. Hendricks
1979, Miscellaneous Field Studies Map 1158
The purpose of these maps is to present recently compiled aeromagnetic data and associated depth estimates to magnetic basement in the upper Mississippi embayment region.  This area is one of the most seismically active regions in the eastern United States.  In 1974, the U.S. Geological Survey initiated magnetic surveys to...
Status of surface-water modeling in the U.S. Geological Survey
Marshall E. Jennings, Nobuhiro Yotsukura
1979, Circular 809
The U.S. Geological Survey is active in the development and use of models for the analysis of various types of surface-water problems. Types of problems for which models have been, or are being developed, include categories such as the following: (1)specialized hydraulics, (2)flow routing in streams, estuaries, lakes, and reservoirs,...
Simulated changes in ground-water levels and streamflow resulting from future development (1970 to 2020) in the Platte River basin, Nebraska
E.G. Lappala, P. A. Emery, F.J. Otradovsky
1979, Water-Resources Investigations Report 79-26
Future changes in ground-water levels and streamflow caused by a limited set of water-resources development conditions were simulated with digital models of stream-aquifer systems within the Platte River Basin, Nebraska. Simulated water-resources use in the basin included private development of ground water for irrigation, Federal development of surface-water systems for...