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Page 5531, results 138251 - 138275

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Mineral resources of proposed additions to the Salmon-Trinity Alps Primitive Area, California
Preston E. Hotz, Robert C. Greene, Terry J. Close, Robert K. Evans
1974, Open-File Report 74-71
A mineral survey of four areas totalling 80 square miles, not included during the 1968-70 examination of the proposed Salmon-Trinity Alps Wilderness, was made by the U.S. Geological Survey and U.S. Bureau of Mines in 1973. Geological Survey personnel mapped the geology and collected stream-sediment and rock samples for spectrographic...
Reconnaissance engineering geology of Sitka and vicinity, Alaska, with emphasis on evaluation of earthquake and other geologic hazards
Lynn A. Yehle
1974, Open-File Report 74-53
A program to study the engineering geology of most of the larger Alaska coastal communities and to evaluate their earthquake and other geologic hazards was started following the 1964 Alaska earthquake; this report about Sitka and vicinity is a product of that program. Field-study methods were of a reconnaissance nature,...
Tin resources of Brazil
Max Gregg White
1974, Open-File Report 74-333
Annual tin production in Brazil, most of it from cassiterite placer deposits in Rondonia Territory, amounts to about 4,000 metric tons (4,400 short tons) of concentrate containing 66 percent tin, much of which is consumed by Brazilian industry. Reserves of cassiterite concentrate in the placers of Rondonia district are estimated at...
South Carolina seismic program
Arthur C. Tarr, Kenneth W. King
1974, Open-File Report 74-58
The principal objectives of the South Carolina Seismic Program are to: (1) provide essential high-quality raw seismic data for earthquakes in South Carolina; (2) compute accurate estimates of event and source parameters; (3) provide a catalog of events and source parameters that will be used in further evaluation of seismic...
Tungsten resources of Brazil
Max Gregg White
1974, Open-File Report 74-332
Brazilian tungsten production, 85 percent of which is exported, comes almost entirely from scheelite-bearing tactites in northeast Brazil, and has reached an annual rate of about 2,000 metric tons (2,200 short tons) of scheelite concentrate with 70 percent WO3. Scheelite ore reserves, located principally in the State of Rio Grande...
A preliminary report on a zone containing thick lignite beds, Denver Basin, Colorado
Paul E. Soister
1974, Open-File Report 74-27
A zone of lignite beds of Paleocene age in the Denver Formation (Upper Cretaceous and Paleocene) lies about 800-1,500 feet above the well-known and extensively mined coal beds of the Laramie Formation (Upper Cretaceous). The zone is a few hundred to as much as 500 feet thick. Where lignite beds...
Land-surface subsidence in the Houston-Galveston region, Texas
R.K. Gabrysch, C.W. Bonnet
1974, Open-File Report 74-123
The pumping of large amounts of ground water in the Houston-Galveston region, Texas, has resulted in water-level declines of as much as 200 feet (61 metres) in wells completed in the Chicot aquifer and as much as 325 feet (99 metres) in wells completed in the Evangeline aquifer during 1943-73....
Summary of hydrologic conditions and effects of Walt Disney World development in the Reedy Creek Improvement District, 1966-73
Arthur L. Putnam
1974, Open-File Report 74-339
The Reedy Creek Improvement District (hereinafter called the RCID) is an area of about 43 square miles (111. square kilometres) in southwest Orange and northwest Osceola Counties. Before development of Walt Disney World began (mid-1967), all of this tract of land was scrubby flatlands and swamp. Walt Disney World facilities...
Water-resources data collected in the Devils Hole area, Nevada, 1973-74
J. D. Larson
1974, Open-File Report 74-330
The U.S. Geological Survey collected water-level, spring-flow, and power-consumption data in the Devils Hole area from July 1973 through June 1974. The work for this second annual data report was financed by the National Park Service. The work for the first annual, report (Larson, 1974) was financed jointly by the...
Hard iron ore at the Cliffs Shaft Mines, Ishpeming, Michigan
Jacob Eugene Gair
1974, Open-File Report 74-227
At the Cliffs Shaft Mines, for many years the premiere hard iron ore mine of Michigan, bodies of ore typically are localized in the upper part of the Negaunee iron-formation, close beneath Goodrich Quartzite in the axial part of the Marquette synclinorium. Individual ore bodies may be as much as...
Floods of January 15-17, 1974, in Northwestern Montana
M. V. Johnson, R. J. Omang
1974, Open-File Report 74-38
Introduction Rain and snowmelt caused several streams in northwestern Montana to flood during January 15-17, 1974. The flooding was caused by a major rainstorm that extended from Montana through Idaho and Washington. The most damage occurred in the Kootenai River drainage, centering around the town of Libby. Also unusually high flows...
A tabulation of K-Ar, Rb-Sr and Pb-alpha ages obtained for materials within the United States (including Alaska and Hawaii) during the years 1956 through 1964
Richard F. Marvin
1974, Open-File Report 74-1068
This tabulation of ages has been made as a convenience to anyone desiring a quick reference to ages published in the United States from 1956 through 1964. This tabulation does not include all published K-Ar, Rb-Sr, or Pb-a ages, but is probably 98 percent complete. Many of the radiometric ages...
A tabulation of K-Ar, Rb-Sr and Pb-alpha ages obtained for materials within the United States (including Alaska and Hawaii) during the years 1969 through 1971
Richard F. Marvin
1974, Open-File Report 74-1070
This tabulation of ages has been made as a convenience to anyone desiring a quick reference to ages published in the United States from 1969 through 1971. This tabulation does not include all published K-Ar, Rb-Sr, or Pb-α ages but is probably 98% complete. Many of the radiometric ages published...
Posssible extension of mineral belts, northern part of Coeur d'Alene district, Idaho
Garland Bayard Gott, Joseph Moses Botbol
1974, Open-File Report 74-67
The ore deposits in the northern part of the Coeur d'Alene district are located within rocks of the Belt Supergroup that have been intruded by Cretaceous quartz monzonites. Lead-zinc-silver replacement veins constitute most of the deposits. The geometry of the district has been modified by post-ore faulting along the Osburn,...
Effects of local geology on ground motion in the San Francisco Bay region, California: A continued study
James F. Gibbs, Roger D. Borcherdt
1974, Open-File Report 74-222
Measurements of ground motion generated by nuclear explosions in Nevada have been completed for 99 locations in the San Francisco Bay region, California. The seismograms, Fourier amplitude spectra, spectral amplification curves for the signal, and the Fourier amplitude spectra of the seismic noise are presented for 60 locations. Analog amplifications,...