The Decaturville, Missouri, impact structure; a geologic summary with map
Terry W. Offield, Howard A. Pohn
1975, Open-File Report 75-310
Ancient mines in Al Kushaymiyah region, Kingdom of Saudi Arabia
A. M. Helaby, F. C. Dodge
1975, Open-File Report 75-58
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...
Helium surveys over known geothermal resource areas in the Imperial Valley, California
Alan A. Roberts
1975, Open-File Report 75-427
Geology and geochronology of the Clear Lake Volcanics, California
B.C. Hearn, Julie M. Donnelly, Fraser E. Goff
1975, Open-File Report 75-296
Geology of the Jabel Ishmas Quadrangle, Kingdom of Saudi Arabia
Louis Gonzales, Vincent J. Flanigan
1975, Open-File Report 75-181
The Jabal Ishmas quadrangle (20/43A) is about 100 km northeast of Qal'at Bishah in the southern part of the Arabian Shield. Most of the terrane in the quadrangle slopes gently westward across broad expanses of pediment, from prominent mountainous north-south ridges in the east to the alluvial and eolian sand-covered...
1974 handbook for U.S.G.S. Central California Microearthquake Network
Travis Houck, Jenny Guerrero, Anne Miller, W.H.K. Lee
1975, Open-File Report 75-397
Preliminary report on the distribution of copper and platinum group metals in mafic igneous rocks of the Sierra Madre, Wyoming
Robert Stroud Houston, J. Eric Schuster, Ballard E. Ebbett
1975, Open-File Report 75-85
Keweenawan geology of the North Ironwood, Ironwood, and Little Girl Point quadrangles, Gogebic County, Michigan
Harold Arthur Hubbard
1975, Open-File Report 75-152
Chemical analyses and C.I.P.W. norms of nineteen volcanic rocks of the Ironwood area, Michigan
Howard Arthur Hubbard
1975, Open-File Report 75-145
Preliminary report on the environmental geology of selected areas of the Southern California continental borderland
H. Gary Greene, S. H. Clarke, M.E. Field, F.I. Linker, H. C. Wagner
1975, Open-File Report 75-596
Possible further evidence for 3.8 b.y.-old rocks in the Minnesota River Valley of southwestern Minnesota
Samuel S. Goldich, Bruce R. Doe, Maryse Helen Delevaux
1975, Open-File Report 75-65
Gas chromatographic method for analysis of TNT and RDX explosives contaminating water and sail-core material
D.F. Goerlitz, LeRoy M. Law
1975, Open-File Report 75-182
A gas chromatographic method for the analysis of both water and soil-core material for TNT and RDX is presented. The explosives may be determined to 0.01 microgram per litre in 1-litre water samples and 0.2 micrograms per kilogram in 50 grams of soil. Provision is made for removal of environmental...
Seismic reflection profiles November 1972 cruise, USNS Bartlett, offshore Central and southern California
H. Gary Greene, Eli A. Silver, Roland E. von Huene
1975, Open-File Report 75-121
Flow characteristics of the Lower Wisconsin River
J. H. Green
1975, Open-File Report 75-582
The flow of water throughout the year and the stream gradient are necessary considerations in evaluating the recreational potential of the lower Wisconsin River. This flow is regulated in part by the dam at Prairie du Sac and influenced considerably by the 47 storage reservoirs and power dams above Lake...
WATSTORE: National Water Data Storage and Retrieval System of the U. S. Geological Survey; user's guide
Norman E. Hutchison
1975, Open-File Report 75-426
The U.S. Geological Survey investigates the occurrence , quantity, quality, distribution, and movement of the surface and underground water resources of the Nation. The investigations, which are conducted by the Water Resources Division, of the Survey include: systematic collection, analysis, and interpretation of water data; investigation of in and agricultural...
High-gain, long-period seismograph station installation report, Matsushiro, Japan
Charles R. Hutt
1975, Open-File Report 75-100
A High-Gain, Long-Period Seismograph System was installed at Matsushiro, Japan, during November and December 1972. The system consists of two horizontal and one vertical seismometer with natural periods of 30 seconds. Each seismometer contains two velocity transducers and one displacement transducer....
High-gain, long-period seismograph station installation report, Kipapa, Hawaii
Charles R. Hutt
1975, Open-File Report 75-369
A High-Gain, Long-Period Seismograph System, developed by the Lamont-Doherty Geological Observatory, was installed at the Kipapa site of the Honolulu Observatory near Ewa Beach, Oahu, Hawaii in March 1972. Magnifications of 55,000 for the vertical component and 40,000 for the horizontal components were obtained. Velocity data are recorded both photographically...
Some limnological aspects of 20 selected lakes in Eagan and Apple Valley, Minnesota
M.R. Have
1975, Open-File Report 75-528
Selected physical, chemical, and biological parameters were determined to assess the quality of 20 lakes in the cities of Eagan and Apple Valley, Minn. All the lakes are eutrophic except Holland and Fish Lakes, which are mesotrophic. Some lakes (including Fish Lake) have storm sewer inlets but are not discernibly...
Origin and age of postglacial deposits and assessment of potential hazards from future eruptions of Mount Baker, Washington
Jack H. Hyde, Dwight Raymond Crandell
1975, Open-File Report 75-286
Eruptions and other geologic processes at Mount Baker during the last 10,000 years have repeatedly affected adjacent areas, and especially the valleys that head at the volcano. Most mudflows from the volcano were caused by massive avalanches of volcanic rock that had been partly altered to clay by steam and...
A water-quality assessment of the Burnham Creek Watershed, Polk County, Minnesota
M.R. Have
1975, Open-File Report 75-647
A water-quality assessment of the Burnham Creek watershed, Polk County, Minn., was made in May 1975. Surface waters were calcium magnesium bicarbonate types with 0.11 mg/liter or less of nitrite plus nitrate nitrogen and 0.10 mg/liter or less of total phosphorous. Fecal coliform bacteria concentrations were between 3 and 720...
Principal facts for gravity stations in the Geysers-Clear Lake region, California
William F. Isherwood, Rodger H. Chapman
1975, Open-File Report 75-107
No abstract available. ...
Preliminary geologic map of the Goodnews A-3 quadrangle and parts of the A-2 and B-2 quadrangles, Alaska
J. M. Hoare, W. L. Coonrad, R. L. Detterman, D. L. Jones
1975, Open-File Report 75-308
No abstract available....
Data from ground magnetic survey of the Ralston Dike, Jefferson County, Colorado
Wilfred P. Hasbrouck, M.L. Botsford, W.P. Jennings
1975, Open-File Report 75-97
A high-quality ground magnetic survey was conducted over the Ralston dike, Jefferson County, Colorado, from September 1973 to June 1974. The data obtained on this survey are tabulated in this report....
Geologic map of the Clayton quadrangle, Custer County, Idaho
S. W. Hobbs, W. H. Hays, David H. McIntyre
1975, Open-File Report 75-76
No abstract available....