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Page 5919, results 147951 - 147975

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Veins in the northern part of the Boulder batholith, Montana
D. M. Pinckney
1965, Open-File Report 65-123
About 20 miles north of Butte and extending nearly to Helena, is an area of 350 square miles containing hundreds of veins and altered zones. The bedrock of the area is 1) late Cretaceous volcanic rocks, forerunners of the Boulder batholith, 2) the Boulder batholith of late Cretaceous to early...
Landslides in the vicinity of the Fort Randall Reservoir, South Dakota
Christopher Forbes Erskine
1965, Open-File Report 65-56
This report covers the first 4 years (1952 through 1956) of a project to investigate landslides in the vicinity of the Fort Randall Reservoir in South Dakota and to determine the effects of the new reservoir on landslide activity....
Geology of the Romanzof Mountains, Brooks Range, northeastern Alaska
Edward G. Sable
1965, Open-File Report 65-141
This remote 700 square mile area in the Brooks Range is topographically rugged and geologically diverse; it contains a granitic pluton, low-grade metamorphic rocks, sedimentary rocks, and mafic igneous rocks, as well as glacial features.Rocks of sedimentary origin include from oldest to youngest:1.Neruokpuk Formation Middle and Upper Devonian(?), more than...
Geology and ore deposits of the central York Mountains, western Seward Peninsula, Alaska
C.L. Sainsbury
1965, Open-File Report 65-142
In the central York Mountains, carbonate rocks of Lower and Middle Ordovician age and aggregating at least 8,000 feet thick are thrust northward over slate and argillaceous limestone of pre-Ordovician age which were intruded by gabbro in pre-Ordovician time. Normal faults of four distinct systems cut the thrust plates, and...
Terrain analysis of the lunar equatorial belt
John Francis McCauley
1965, Open-File Report 65-104
The U. S. Geological Survey began, in November 1963, a terrain analysis of the lunar equatorial belt (10°N-10°S, 60° W15°E), on behalf of the National Aeronautics and Space Administration. The purpose of the study is to establish a quantitative classification system in terms of different degrees of relative resolvable roughness,...
Density comparison method for the measurement of isotopic variations in prepared waters
Joseph Howard McCarthy Jr., Thomas Seward Lovering, Herbert Williams Lakin
1965, Open-File Report 65-103
The falling-drop method of density determination has been modified so that the densities of a standard and a sample water are compared simultaneously. A constant temperature bath that does not vary more than 0.0001°C and an accurate double micropipet are described. The method has sufficient sensitivity and precision to distinguish...
Plant and miscellaneous microfossils of the Pierre Shale
Estella B. Leopold, Bernadine D. Tschudy
1965, Open-File Report 65-97
This preliminary report summarizes part of a Survey program to study, in detail, the stratigraphy and paleontology of a nearly complete sequence of Pierre Shale near Redbird, Wyoming. The physical stratigraphy and correlations are being analyzed by James Gill and W. A. Cobban. Various groups of invertebrate fossils are under...
Hot brines and recent iron deposits in deeps of the Red Sea
A.R. Miller, C.D. Densmore, E.T. Degens, J.C. Hathaway, F.T. Manheim, P.F. McFarlin, R. Pocklington, A. Jokela
1965, Open-File Report 65-180
Sedimentary iron and heavy-metal deposits of undetermined size have been found in the middle of the Red Sea some 2000 meters below the surface of the sea. This discovery has been made from the Research Vessel Atlantis II, which is still at sea engaged in a series of oceanographic investigations which...
Field determination of nanogram quantities of mercury in soils and rocks
Margaret Hinkle, Kam Wo Leong, F. N. Ward
1965, Open-File Report 65-71
A method for determining nanogram quantities of mercury in geological materials is based on the catalytic effect of mercury on the reaction of ferrocyanide with nitrosobenzene to produce a violet-covered compound whose intensity if proportional to the mercury present. The mercury is released by heating a sample of soil or...
Gravity survey in southern Cascade Range, California
Thomas R. LaFehr
1965, Open-File Report 65-92
A regional gravity survey in the southern Cascade Range and environs was made during the summers of 1962 and 1963. Twelve hundred gravity stations were established within the area enclosed by lat 41°00'N, lat 42°301N, long 120°00'W, and long 124°00'W. Most of the stations are concentrated in an area overlapping...
Allanites from the Boulder Creek batholith, Colorado
Nelson L. Hickling
1965, Open-File Report 65-70
This study of accessory allanites from the Boulder Creek batholith is an adjunct to the comprehensive petrologic study that batholith by George Phair and David Gottfried of the U.S. Geological Survey....
Gravity survey in the San Luis Valley area, Colorado
J. Robert Gaca, Daniel E. Karig
1965, Open-File Report 66-46
During the summers of 1963 and 1964, a regional gravity survey covering 6,000 square miles of the San Luis Valley and surrounding areas was made to determine subsurface basement configurations and to guide future crustal studies. The San Luis Valley, a large intermontane basin, is a segment of the Rio...