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Page 4671, results 116751 - 116775

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Hornblende-rich, high grade metamorphic terranes in the southernmost Sierra Nevada, California, and implications for crustal depths and batholith roots
Donald Clarence Ross
1983, Open-File Report 83-465
The southernmost Sierra Nevaaa widely exposes hornblende-rich, gneissic to granoblastic, amphibolite- to granulite-grade, metamorphic rocks and associated magmatic rocks, all of mid-Cretaceous age. Locally, red garnet, in part in euhedral crystals as large as 10 cm, as well as strongly pleochroic hyperstnene, characterize these rocks. These hornblende-rich rocks dominate the...
Time series analysis of Cenozoic era sea level and paleotemperature data
George H. Rosenfield, Tod E. Huffman
1983, Open-File Report 83-566
A statistical analysis of Cenozoic era sea level and paleotemperature data was performed to determine the cycles of each data set and the correspondence between them. Accordingly, each of the four time series were first analyzed independently in the univariate mode of a spectral analysis. The two basic data sets...
Instructions for the submission of data to the Master Water Data Index
Owen O. Williams
1983, Open-File Report 83-49
Instructions are given for the computerized processing of data prepared for entry into the Master Water Data Index of the U.S. Geological Survey 's National Water Data Exchange (NAWDEX), as discussed in the manual entitled ' Instructions for the Preparation of Data for the Master Water Data Index. ' Two...
Short-range vertical variation in organic carbon, carbonate carbon, total sulfur contents and Munsell color values in a core from the Upper Pennsylvanian Stark Shale Member of the Dennis Limestone, Wabaunsee County, Kansas
M.R. Stanton, Joel S. Leventhal, Joseph R. Hatch
1983, Open-File Report 83-315
Organic carbon, total sulfur, carbonate carbon and Munsell color value were determined for 21 successive samples from a 53-cm-thick section of drill core. These samples are from the Stark Shale Member of the Dennis Limestone of Upper Pennsylvanian age, Wabaunsee County, Kansas. The data confirm previous results (Hosterman and Whitlow,...
Water and streambed-material data, Eagle Creek watershed, Indiana, August 1980, October and December 1982, and April 1983; updating of U.S. Geological Survey Open-file report 83-215
David J. Wangsness
1983, Open-File Report 83-532
Water-quality surveys within the Eagle Creek watershed were done by the U.S. Geological Survey in August 1980, October and December 1982 and April 1983 in cooperation with the city of Indianapolis, Department of Public Works. Streambed-material and water samples were collected from Finley and Eagle Creek and was analyzed for...
A practical, low-noise coil system for magnetotellurics
William D. Stanley, Richard D. Tinkler
1983, Open-File Report 83-85
Magnetotellurics is a geophysical technique which was developed by Cagnaird (1953) and Tikhonov (1950) and later refined by other scientists worldwide. The technique is a method of electromagnetic sounding of the Earth and is based upon the skin depth effect in conductive media. The electric and magnetic fields arising from...
Literature assessment of the Charlotte Harbor estuarine system and surrounding area, Southwest Florida
Yvonne E. Stoker, George A. Karavitis
1983, Open-File Report 83-127
The Governor of Florida established the Charlotte Harbor Resource Planning and Management committee to recommend the course of action Florida should take in planning for potential growth in the rapidly growing area surrounding Charlotte Harbor. In May 1981, the U.S. Geological Survey began a planning study to determine detailed hydrologic...
Basic program "IPFLTR" for induced polarization data reduction and filtering
Hamdy S. Sadek
1983, Open-File Report 83-485
The recently developed induced polarization (IP) mapping technique can be successfully applied to IP dipole-dipole data and includes three types of filters that can be applied to IP pseudosections that have IP anomalies caused by different types of sources. The technique yields a single output value per station; this value...
Work plan for the Sangamon River basin, Illinois
J. K. Stamer, Dean M. Mades
1983, Open-File Report 82-693
The U.S. Geological Survey, in cooperation with the Division of Water Resources of the Illinois Department of Transportation and other State agencies, recognizes the need for basin-type assessments in Illinois. This report describes a plan of study for a water-resource assessment of the Sangamon River basin in central Illinois. The...
Occurrence and use of ground water in the Venice-Englewood area, Sarasota and Charlotte counties, Florida
Horace Sutcliffe, Thomas H. Thompson
1983, Open-File Report 82-700
In a 75-square-mile area of coastal Sarasota and Charlotte Counties, demand for water is increasing. Groundwater, the principal source of supply, is distributed largely by public water systems. Principal water-bearing formations in descending order, include the surficial aquifer, artesian zone 1 in the Tamiami Formation, zone 2 in the upper...
Geochronology, geochemistry, and tectonic environment of porphyry mineralization in the central Alaska Peninsula
Frederic H. Wilson, Dennis P. Cox
1983, Open-File Report 83-783
Porphyry type sulfide systems on the central Alaska Peninsula occupy a transition zone between the Aleutian island magmatic arc and the continental magmatic arc of southern Alaska. Mineralization occurs associated with early and late Tertiary magmatic centers emplaced through a thick section of Mesozoic continental margin clastic sedimentary rocks. The...
Geophysical and geologic studies in southern Mecklenburg County and vicinity, North Carolina and South Carolina
Frederick A. Wilson
1983, Open-File Report 83-93
Geophysical methods consisting of gravity, aeromagnetics and aeroradioactivity have been applied to part of the Charlotte and Carolina slate belts in southern Mecklenburg County and vicinity to help interpret geology, lithology and structure. High aeroradioactivity is associated with potassium-rich granitic plutons, muscovite-rich gneisses, schists, and metavolcanic rocks; positive gravity and...