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Page 5146, results 128626 - 128650

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Not all publications have extents, not all extents are completely accurate
Ground-water-quality data from the northern Powder River Basin, southeastern Montana
Roger W. Lee
1979, Open-File Report 79-1331
Water-quality data collected during 1973-77 for hydrologic studies in the northern Powder River basin of southeastern Montana provide a data base for shallow ground water. The 665 water samples collected were analyzed for major cations and anions. Of the samples, 516 were from wells and 149 were from springs. About...
GNAP (Graphic Normative Analysis Program)
Roger W. Bowen, John Odell North, L.D.
1979, Open-File Report 79-1211
A user-oriented command language is developed to provide direct control over the computation and output of the standard CIPW norm. A user-supplied input format for the oxide values may be given or a standard CIPW Rock Analysis format may be used. Once the oxide values have been read by the...
Accessory opaque oxides from hybrid granitoid rocks of the southern Snake Range, Nevada
Donald E. Lee, Richard E. Van Loenen
1979, Open-File Report 79-1608
Analytical data are presented for 12 magnetite and 6 ilmenite samples recovered from hybrid granitoid rocks of the southern Snake Range, Nevada. The magnetites are unusual for their very low contents of TiO2 and for their similarity of composition over a range of petrologic types. The ilmenites are somewhat unusual...
Documentation of a finite-element two-layer model for simulation of ground-water flow
Michael J. Mallory
1979, Water-Resources Investigations Report 79-18
This report documents a finite-element model for simulation of ground-water flow in a two-aquifer system where the two aquifers are coupled by a leakage term that represents flow through a confining layer separating the two aquifers. The model was developed by Timothy J. Durbin (U.S. Geological Survey) for use in...
Hydrologic data for floods of July 1978 in Southeast Minnesota and Southwest Wisconsin
V.J. Latkovich
1979, Open-File Report 79-1166
Intense storms of July 1978 caused floods of historical significance in southeast Minnesota and southwest Wisconsin. Local, State, and Federal officials need data and information to evaluate, coordinate, and manage programs concerned with floods and flood losses. Because of a need to document stream discharges, elevations, and sediment concentrations, current-meter...
Analytical method for dissolved-organic carbon fractionation
Jerry A. Leenheer, Edward W. D. Huffman Jr.
1979, Water-Resources Investigations Report 79-4
A standard procedure for analytical-scale dissolved organic carbon fractionation is presented, whereby dissolved organic carbon in water is first fractionated by a nonionic macroreticular resin into acid, base, and neutral hydrophobic organic solute fractions, and next fractionated by ion-exchange resins into acid, base, and neutral hydrophilic solute fractions. The hydrophobic...
Geologic description of selected strong-motion accelerograph sites, Part II
B.L. Silverstein
1979, Open-File Report 79-428
One of the major tasks of the U.S. Geological Survey as regards seismic engineering is the collection and dissemination of strong-motion accelerograph records. When analyzing these records certain information describing the instrument site is important: local geology; instrument housing (buildings, dams, bridges, instrument shelters, etc.); local topography; and proximity of...
Water-resources data, 1970-75, for Perris Valley and vicinity, Riverside County, California
David J. Lang
1979, Open-File Report 79-1256
In 1969 the U.S. Geological Survey began in Perris Valley, Calif., to determine changes in the hydrologic regime as a rural area becomes urbanized. The investigations spanned several years when precipitation was below normal in most of southern California. Surface-water records were collected for a 6-year period at 21 sites, and...
Hydrologic data for urban studies in the Fort Worth, Texas, metropolitan area, 1977
R.M. Slade Jr., J.M. Taylor, D.L. Haynes
1979, Open-File Report 79-216
Hydrologic investigations of urban areas in Texas were begun by the U.S. Geological Survey in 1954. These investigations are now in progress in several major metropolitan areas including Austin, Dallas, Dallas County, Fort Worth, Houston, and San Antonio.In October 1968, the Geological Survey, in cooperation with the city of Fort...
U.S. Geological Survey activities in New York, 1979
Anne Finch, Paula Gori
1979, Open-File Report 80-51
This report describes the work of the U.S. Geological Survey and summarizes projects conducted in New York during 1979. Many of these projects are continuing into the 1980's. The major programs provide basic scientific information concerning water, land, and mineral resources. The Survey also supervises the exploration for mineral fuels...