Skip to main content
U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Results

183909 results.

Alternate formats: RIS file of the first 3000 search results  |  Download all results as CSV | TSV | Excel  |  RSS feed based on this search  |  JSON version of this page of results

Page 6792, results 169776 - 169800

Show results on a map

Publication Extents

Not all publications have extents, not all extents are completely accurate
Thickness and consolidation of deep-sea sediments: A discussion
G.H. Davis
1960, Bulletin of the Geological Society of America (71) 1727-1728
Hamilton (1959) concluded that in most sediments excess pore-water pressure is equal to zero - that is, the hydrostatic pressure is at atmospheric pressure. This note points out that in terrestrial environments the occurrence of artesian water (excess pore-water pressure) is commonplace and widespread and that such excess pressure is the...
Grid method of determining mean flow-distance in a drainage basin
M.W. Busby, M. A. Benson
1960, International Association of Scientific Hydrology - Bulletin (5) 32-36
The basin characteristics Σal or L ca are useful in hydrologic studies, but existing methods of determining them are either tedious or somewhat inaccurate. The grid method presented herein lessens the amount of tedious labor and provides an accurate measure of either Σal or L ca . An adaptation of the method could be used to compute the...
Transcurrent faulting and volcanism in Owens Valley, California
L. C. Pakiser
1960, Bulletin of the Geological Society of America (71) 153-160
In the Owens Valley region of California, volcanic activity of Cenozoic age was confined mainly to three areas near the ends of important faults. The volcanic eruptions seemingly took place in regions of relative tension, if the horizontal movement along these faults was left lateral. The deep depression of Owens Valley may have...
Foothills fault system, western Sierra Nevada, California
L. D. Clark
1960, Bulletin of the Geological Society of America (71) 483-496
A large fault system, here named the Foothills fault system, is the dominant structural feature of the western Sierra Nevada. The steeply dipping to vertical component faults trend northwestward through an area about 200 miles long and 30 miles wide north of 37°30' north latitude. The faulted Paleozoic and Mesozoic...
Glaciation of the east slope of Rocky Mountain National Park, Colorado
Gerald M Richmond
1960, Bulletin of the Geological Society of America (71) 1371-1382
The eastern slope of Rocky Mountain National Park, Colorado, has been subjected to at least three separate Pleistocene glaciations, which from oldest to youngest are correlated with the Buffalo, Bull Lake, and Pinedale glaciations of Blackwelder in the Wind River Mountains of Wyoming. In this area, deposits of the oldest glaciation are...
Mineral paragenesis of precambrian rocks in the Tenmile Range, Colorado
A. H. Koschmann
1960, Bulletin of the Geological Society of America (71) 1357-1370
A Precambrian complex of granulite, gneiss, and migmatite, intruded by numerous plutons of granitic rocks correlated with the Silver Plume granite, is exposed in a long narrow belt along the crest and upper slopes of the Tenmile Range, Colorado. The metamorphic rocks are predominantly felsic; bands, lenses, and irregular bodies of mafic rocks rich in biotite,...
Geophysical investigation of Mono Basin, California
L.C. Pakisek, F. Press, M. F. Kane
1960, Bulletin of the Geological Society of America (71) 415-448
Gravity and seismic studies in Mono Basin, Mono County, California, completed during the summer of 1957 revealed a large, roughly triangular block that had subsided about 18,000 ± 5000 feet and received an accumulation of about 300 ± 100 cubic miles of light clastic sediments and volcanic material of Cenozoic age....
Application of seismic methods to a ground-water problem in northeastern Ohio
R. E. Warrick, J.D. Winslow
1960, Geophysics (25) 505-519
Valleys cut in the bedrock in northeastern Ohio by Tertiary and Pleistocene streams have been filled by Pleistocene glacial drift so that there is little surface evidence of their existence. Some of these buried valleys are good sources of ground water, so information regarding the location, depth, and cross-section of the buried...
Geology of the Mayagüez area, Puerto Rico
Peter H. Mattson
1960, Bulletin of the Geological Society of America (71) 319-362
The Mayagüez area forms the southwestern corner of Puerto Rico, west of 67° W. and south of 18° 15' N. One-third of the 640 square kms is covered by thick alluvium. Unconformities separate a basal complex, two sequences of highly folded igneous and sedimentary rocks, and a younger sequence of gently...
Structure associated with rock creep in the Black Hills, South Dakota
J.J. Norton, J. A. Redden
1960, Geological Society of America Bulletin (71) 1109-1112
Many areas of schist in the southern Black Hills, South Dakota, have a thin zone of disintegrated rock that is 4-10 feet below the ground surface and parallel to it. Fresh, undeformed schist overlying this zone has moved downhill in a mass-wasting process since the present surface was formed. ...
Position of the salt-water body in the magothy(?) formation in the Cedarhurst-Woodmere area of southwestern Nassau county, Long Island, N.Y.
N.J. Lusczynski, W.V. Swarzenski
1960, Economic Geology (55) 1739-1750
The position and chloride concentration of a sizable body of salt water, moving slowly landsyard from the south-shore bays of Long Island and the Atlantic Ocean were defined by recent test drilling in the Cedarhurst-Woodmere area of southwestern Nassau County, Long Island, N. Most of the salt-water body is in the lower part of a...
The chief oxide-burgin area discoveries, East Tintic district, Utah; A case history
J.B. Bush, D.R. Cook, T. S. Lovering, H. T. Morris
1960, Economic Geology (55) 1507-1540
In 1955 exploration for base and precious metals was undertaken by Bear Creek Mining Company immediately north of the Main Tintic district, Utah. During the course of this work Bear Creek became interested in the East Tintic district, primarily as a result of the activities of the U.S. Geological Survey in...
A rapid and accurate contour interpolator
O.T. Marsh
1960, Economic Geology (55) 1555-1560
An instrument called a "contourpolator" is described. The device is constructed from readily available materials costing about $2.00 and consists of 4 primary parts. Detailed instructions are provided for its assembly and use....
Metallization and post-mineral hypogene argillization, Lost River tin mine, Alaska
C.L. Sainsbury
1960, Economic Geology (55) 1478-1506
The Lost River tin and tungsten deposit occurs in a buried granite pluton and in associated rhyolite dikes that intrude Paleozoic limestone. The dikes and parts of the granite were greisenized and then argillized irregularly. Metallization accompanied greisenization rather than argilli-zation, although both processes probably were closely related in time. Iron-zinc ratios...
Scheelite in the precambrian gneisses of Colorado
O.L. Tweto
1960, Economic Geology (55) 1406-1428
Scheelite of Precambrian age has been found at several localities in Colorado and Wyoming in recent years. Most of it is disseminated in regionally metamorphosed rocks, principally in calc-silicate gneiss, but also in amphibolite. Small amounts are found in pegmatites and in gold-or copper-quartz veins of Precambrian age. The scheelite in most of the deposits contains molybdenum, and much of...