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Page 1191, results 29751 - 29775

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Publication Extents

Not all publications have extents, not all extents are completely accurate
A model for earthquakes near Palisades Reservoir, southeast Idaho
David L. Schleicher
1975, Open-File Report 75-12
The Palisades Reservoir seems to be triggering earthquakes: epicenters are concentrated near the reservoir, and quakes are concentrated in spring, when the reservoir level is highest or is rising most rapidly, and in fall, when the level is lowest. Both spring and fall quakes appear to be triggered by minor...
Geology of the Khyber Pass, Khyber Agency, Pakistan
Karl W. Stauffer
1975, Open-File Report 75-272
The defile of the Khyber Pass is cut in the massive gray recrystallized Khyber Limestone whose thickness exceeds 3,000 feet. Although no fossils have been found in the immediate vicinity of the pass, assemblages collected at the end of the last century from 5 miles south of the pass, and...
Geology of the Gilgit-Hispar area, Gilgit Agency, Pakistan
Karl W. Stauffer
1975, Open-File Report 75-273
The Gilgit-Hispar area contains a large variety of igneous and metamorphic rocks, which have been grouped into seven general lithologic units, five composed largely of metamorphic rocks and two of intrusive rocks. The metamorphic units consist of probable correlatives of the Precambrian(?) Salkhala Series; the upper Paleozoic, slightly metamorphosed schists,...
A general purpose contouring system
Gerald Ian Evenden
1975, Open-File Report 75-317
Three Decsystem-10 FORTRAN IV programs provide a general purpose system for contouring two-dimensional data. The system can provide both quick or final, publication quality contour maps on either interactive or offline plotting devices. Complete user documentation, with examples, and program listings are presented....
A program for mass spectrometer control and data processing analyses in isotope geology; written in BASIC for an 8K Nova 1120 computer
J. S. Stacey, J. Hope
1975, Open-File Report 75-127
A system is described which uses a minicomputer to control a surface ionization mass spectrometer in the peak switching mode, with the object of computing isotopic abundance ratios of elements of geologic interest. The program uses the BASIC language and is sufficiently flexible to be used for multiblock analyses of...
A mineralogical study of the Guanajuato, Mexico, silver ores
Ivan Franklin Wilson, Charles Milton, Joseph Rollins Houston
1975, Open-File Report 75-70
The silver-gold ores now being worked in the Guanajuato, Mexico, mining district consist chiefly of argentite and native gold-silver, with minor amounts of polybasite, pyrargyrite, and some argyrodite, a silver germanium sulfide. With these are always associated galena, sphalerite, chalcopyrite, pyrite, and minor amounts of marcasite. The gangue is generally...
Petrography of University of Washington dredge samples for the central Chukchi Sea
Jeremy B. Platt
1975, Open-File Report 75-269
Twenty thin sections of rocks dredged from the central Chukchi Sea have been examined petrographically and compared with some onshore rocks in northern Alaska. Of these, 16 are sandstones, three are highly CaCO3-rich silts and carbonate rocks, and one is an olivine-magnetite-rich basalt. Eight of the sandstones have been point-counted...
Water availability and geology of Sumter County, Alabama
Marvin E. Davis, Thomas H. Sanford, Patrick O. Jefferson
1975, Open-File Report 75-459
Geologic units that crop out in Sumter County include the Selma Group of Late Cretaceous age; the Midway and Wilcox Groups of Tertiary Age; and terrace deposits and alluvium of Quaternary age. The Tuscaloosa Group, consisting of the Coker and Gordo Formations, and Eutaw Formation of Late Cretaceous age underlie...
Water availability and geology of Hale County, Alabama
Marvin E. Davis, Thomas H. Sanford Jr., Patrick O. Jefferson
1975, Open-File Report 75-452
Geologic units that underlie and crop out in Hale County include the Tuscaloosa Group, Eutaw Formation, and Selma Group of Late Cretaceous age, and terrace deposits and alluvium of Quaternary age. The Cretaceous units dip southwest about 35 feet per mile and strike northwest. They consist chiefly of deposits of...
Availability of ground water in Marion County, Indiana
William R. Meyer, J. P. Reussow, D. C. Gillies, W. J. Shampine
1975, Open-File Report 75-312
County constitute the most extensive aquifers in the county. Four areally distinct sand and gravel aquifers were mapped in the drift during the course of this study. The aquifer of greatest economic importance consists of sand and gravel deposits of glacial-outwash origin which coincide with the courses of the White...
Geological Survey and selected U.S. Bureau of Mines and Alaska Division of Geological and Geophysical Surveys reports and maps on Alaska released during 1974, indexed by quadrangle
Edward Huntington Cobb
1975, Open-File Report 75-128
All Geological Survey reports and maps on Alaska published or released to open files during 1974 are listed by the quadrangle (scale 1:250,000) into which Alaska has been divided for topographic mapping (p. 2). Also listed are U.S. Bureau of Mines reports on the geology and mineral resources of Alaska,...