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Principal facts for gravity stations in the Elko, Steptoe Valley, Coyote Spring Valley, and Sheep Range areas, eastern and southern Nevada
D.L. Berger, D. H. Schaefer, E. A. Frick
1990, Open-File Report 89-30
Principal facts for 537 gravity stations in the carbonate-rock province of eastern and southern Nevada are tabulated and presented. The gravity data were collected in support of groundwater studies in several valleys. The study areas include the Elko area, northern Steptoe Valley, Coyote Spring Valley, and the western Sheep Range...
Preliminary geologic map of the Thaniyat Turayf Quadrangle, sheet 29C, Kingdom of Saudi Arabia
C. R. Meissner Jr., S.M. Dini, A.M. Farasani, G.P. Riddler, G.H. Smith, M.B. Griffin, Marcel Van Eck
1990, Open-File Report 90-259
The Thaniyat Turayf quadrangle, sheet 29C, lies in the northwestern part of Saudi Arabia near the border with Jordan. The quadrangle is located between lat 29°00'-30°00' N. and long 37°30'-39°00' E. It includes the southwestern rim of the Sirhan-Turayf Basin and is underlain by Silurian to Miocene- Pliocene sedimentary rocks...
Geology of the Mahd Adh Dhahab District, Kingdom of Saudi Arabia
A.M. Afifi
1990, Open-File Report 90-315
Approximately 200 km2 around the Mahd adh Dhahab mine were mapped at 1:18,000 scale, with emphasis on establishing the volcanic stratigraphy. The Mahd Group, which rests over a basement of metamorphosed tonalite, is divided into the Lahuf formation and Tuwal formation, which are separated by an unconformity. The Lahuf is...
Map showing free-air gravity anomalies off the western coast of Africa Senegal (south of 15° north latitude) to Sierra Leone
D. W. Folger, B.J. Irwin, J.R. McCullough, G.R. Driscoll, C. F. Polloni
1990, Miscellaneous Field Studies Map 2098-D
This map is one of six in a series presenting marine gravity data off the western coast of Africa (fig. 1).  The data, collected by the U.S. Geological Survey (USGS) in 1987 in response to a request from the Defense Mapping Agency, are intended to improve gravity coverage where it...
Ground-water flow and solute movement to drain laterals, western San Joaquin Valley, California; I, Geochemical assessment
S. J. Deverel, J.L. Fio
1990, Open-File Report 90-136
A study was undertaken to quantitatively evaluate the hydrologic processes affecting the chemical and isotopic composition of drain-lateral water in a drained agricultural field in the western San Joaquin Valley, California. The results of chemical and isotopic analysis of the samples and analysis of hydraulic-head data and drain-lateral flow data...