Titanium deposits in alkalic igneous rocks
Norman Herz
1975, Open-File Report 75-35
Many types of alkalic rocks are enriched in Ti02 relative to the average for the crust. Silicate minerals in these rocks may have high Ti02 contents, but the oxides ilmenite, rutile, brookite, and perovskite are also characteristic primary phases. These tend to be higher in niobium than are the same...
Selected stratigraphic sections of Cambrian and Ordovician rocks in Arizona, New Mexico, and western Texas
Philip Thayer Hayes
1975, Open-File Report 75-178
Information from 68 surface localities that I visited was used in the preparation of a report on the Cambrian and Ordovician rocks of Arizona, New Mexico, and western Texas (Hayes, 1975). Descriptions of the stratigraphic sequence at many of these localities have been published in various reports and a majority...
Statement to the California State Board of Forestry relative to physical events and processes in Redwood National Park, Humboldt County, California
Richard J. Janda
1975, Open-File Report 75-606
Landforms map of the Vienna Quadrangle, Virginia and Maryland
H.G. Rogers
1975, Open-File Report 75-598
Correlation of photogeology and remote sensing data along the Apollo 14 Bistatic-Radar ground track; Part I, A working compendium
Henry J. Moore, G.L. Tyler, J. M. Boyce, R.W. Shorthill, T.W. Thompson, A. S. Walker, D.E. Wilhelms, S.S.C. Wu, S.H. Zisk
1975, Open-File Report 75-284
Geologic map for land use planning, Prince Georges County, Maryland
John Tilton Hack
1975, Open-File Report 75-208
Principal facts for gravity stations in Steamboat Hills and Wabuska, Nevada
Donald L. Peterson
1975, Open-File Report 75-443
Aeromagnetic map of the Enoree Quadrangle, South Carolina
Water Resources Division, U.S. Geological Survey
1975, Open-File Report 75-51
Age and tectonic significance of volcanic rocks on St. Matthew Island, Bering Sea, Alaska
William Wallace Patton Jr., Marvin A. Lanphere, Thomas P. Miller, Richard A. Scott
1975, Open-File Report 75-150
Reconnaissance investigations of the heretofore little known volcanic assemblage on St. Matthew Island provide significant information on the tectonic history of the Bering Sea shelf. St. Matthew Island is made up of approximately 500 m of subaerial calc-alkaline volcanic rocks ranging in composition from high-alumina basalt to rhyolite. Four K-Ar...
Sediment characteristics of streams in the eastern Piedmont and western Coastal Plain regions of North Carolina
Clyde E. Simmons
1975, Open-File Report 75-291
The sediment-transport characteristics of streams were determined in a 6,000-square-mile (15,500-square-kilometre) area of the Coastal Plain and Piedmont regions of eastern North Carolina during 1969-73. The study covered all or parts of 21 counties and included data for 28 sediment-sampling stations located in parts of 4 major river basins, the...
Reconnaissance map of surficial geology of Hazard North Quadrangle, Kentucky River Area Development District, eastern Kentucky
Wayne L. Newell
1975, Open-File Report 75-82
Numerical model of the salt-wedge reach of the Duwamish River estuary, King County, Washington
Edmund A. Prych, W.L. Haushild, J.D. Stoner
1975, Open-File Report 75-13
A numerical model of a salt-wedge estuary developed by Fischer has been expanded and used to calculate the distributions of salinity, temperature, chlorophyll a concentrations, biochemical oxygen demand, and dissolved-oxygen concentrations in the Duwamish River estuary, King County, Wash. With this model, which was calibrated and verified with observed data,...
Geologic map of the Worthville Quadrangle, north-central Kentucky
A. B. Gibbons
1975, Open-File Report 75-113
A water-quality assessment of the Rock Creek (Cass) watershed, Cass and Carroll counties, Indiana
Mark A. Ayers
1975, Open-File Report 75-324
A water-quality assessment of the Rock Creek (Cass) watershed was made June 12 and 13, 1974. Nutrients were resampled November 7, 1974. Surface waters within the watershed were calcium bicarbonate types with very similar concentrations of major dissolved constituents. Samples collected June 13 contained between 7.4 and 14 milligrams per...
Preliminary geologic map of the Teapot Mountain Quadrangle, Pinal County, Arizona
S.C. Creasey, D. W. Peterson, N.A. Gambell
1975, Open-File Report 75-314
Contour map of the base of saprolite, Vienna Quadrangle, Virginia-Maryland
Sherman K. Neuschel, A.J. Froelich
1975, Open-File Report 75-519
Preliminary report on the geology and sand and gravel resources of Cape Cod Bay, Massachusetts
Robert N. Oldale, Charles J. O’Hara
1975, Open-File Report 75-112
Water availability of Choctaw County, Alabama
John G. Newton, Jerald F. McCain
1975, Open-File Report 75-477
Large quantities of ground water and surface water are available in Choctaw County. Major sources of ground water are the Nanafalia Formation, Tuscahoma Sand, Hatchetigbee Formation, and Gosport Sand and Lisbon Formation. The Nanafalia Formation is the most productive source of ground water, and individual wells will yield as much...
Preliminary experiments with a modified tracer technique for measuring stream reaeration coefficients
R. E. Rathbun, David J. Shultz, Doyle W. Stephens
1975, Open-File Report 75-256
Preliminary evidence for Holocene movement along the Belair fault zone near Augusta, Georgia
David C. Prowell, Bruce J. O’Connor, Meyer Rubin
1975, Open-File Report 75-680
The Belair fault zone has the youngest displacement recognized to date in the southeastern United States and is the only fault zone dated as having moved in Holocene time. A trench cut across one of the faults in the zone shows lenses of organic material cut by and dragged into...
Geologic map of the Iris Quadrangle, Gunnison and Saguache counties, Colorado
Jerry C. Olson
1975, Open-File Report 75-63
No abstract available. ...
Appraisal of phosphate in Pakistan
James W. Mytton
1975, Open-File Report 75-623
Audio-magnetotelluric methods in reconnaissance geothermal exploration
Donald B. Hoover, Carl L. Long
1975, Open-File Report 75-362
About three years ago, at the initiation of a major effort by the U.S. Geological Survey into studies of geothermal systems, a decision was made to evaluate the audio-magnetotelluric, AMT, technique for this application. At that time we had had no real experience with the method nor any equipment. Some...
An appraisal of groundwater for irrigation in the Appleton area, west-central Minnesota
Steven J. Larson
1975, Open-File Report 75-32
Supplemental irrigation of well-drained sandy soils has prompted an evaluation of ground water in the Appleton area. Glacial drift aquifers are the largest source of ground water. The surficial outwash sand and gravel is the most readily available and a really extensive drift aquifer and underlies much of the sandy...
Reconnaissance map of surficial geology of Beattyville Quadrangle, Kentucky River Area Development District, eastern Kentucky
Wayne L. Newell
1975, Open-File Report 75-81
