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Fluid impact craters and hypervelocity - high velocity impact experiments in metals and rocks
H. J. Moore, R.W. MacCormick, D. E. Gault
1963, Open-File Report 63-100
The impact phenomena of hypervelocity and high-velocity projectiles with rock and metal targets are being studied in a cooperative research program conducted by the U.S. Geological Survey and the Ames Research Center of the National Aeronautics and Space Administration. This paper deals with the comparison of: (1) fluid-impact craters produced...
Uranium in sediments
John Nicholas Rosholt
1963, Open-File Report 63-117
An oceanographic approach is used to study the distribution of abnormal occurrences of uranium in sediments. The occurrences predominate in marine phosphorites, black marine shales, and deposits in terrestrial-fluvial sandstones and ancient conglomerites. In early Paleozoic times, marine shales accounted for the majority of uranium deposition. By the beginning of...
Preliminary interpretation of an aeromagnetic survey in north-central Iowa
John Richard Henderson, Walter S. White, Isidore Zietz
1963, Open-File Report 63-45
Publication of Lyons' gravity map of the United States in 1950 focused attention on a spectacular geophysical feature now generally referred to as the "midcontinent gravity high." This feature, the largest gravity maximum in North America, was discovered and later detailed by geophysicists at the University of Wisconsin (Woollard, 1943,...
Preliminary interpretation of an aeromagnetic survey in central and southwestern Iowa
John Richard Henderson, Isidore Zietz, Walter S. White
1963, Open-File Report 63-46
The U. S. Geological Survey made a 10,000 square mile aeromagnetic survey of central and southwestern Iowa in mid-1962. This work, done in cooperation with the Iowa Geological Survey, completed magnetic coverage for the approximately 220 mile section of the "midcontinent gravity high" located in Iowa....
Geology of the salt deposits and the salt industry of northern Chile
George Edward Ericksen
1963, Open-File Report 63-31
The study of the salt deposits of northern Chile is a cooperative project of the Institute de Investigaciones Geologicas (IIG) of Chile and the United Nations Special Fund and is part of a mineral resources survey, undertaken by these two organizations, of selected regions of northern Chile, during 1960-1963. The...
Report on the operation of Barnaby, summer, 1948
Henry Faul
1963, Open-File Report 63-32
Barnaby is a self-contained truck-mounted unit for gamma-ray logging of diamond drillholes less than 200 feet deep. The radiation is detected by Geiger-Muller counter and the impulses are transmitted up a single-conductor shielded cable by a special circuit. At the surface the impulses are electronically counted and the average counting...
Stratigraphic sections and correlation of beds in the Inyan Kara Group and Morrison Formation, north end of the Black Hills, Crook County, Wyoming, and Butte County, South Dakota
W. J. Mapel, C. L. Pillmore
1963, Open-File Report 63-88
Descriptions of 47 stratigraphic sections of the Ivan Kara Group and Morrison Formation are given for an area extending from bluffs on the west side of the Belle Fourche River in T. 56 N., R. 64 W., Crook County, Wyo., southeastward across the Bear Lodge Mountains to a point in...
Geology of the Anlauf and Drain quadrangles, Douglas and Lane counties, Oregon
Linn Hoover
1963, Open-File Report 59-56
The Anlauf and Drain quadrangles, Oregon, lie about 20 miles south of the City of Eugene, in Douglas and Lane Counties. They constitute an area of about 435 square miles that includes parts of both the Cascade Range and Coast Range physiographic provinces.A sequence of lower Tertiary sedimentary and volcanic...
Fossils from lower part of the Mancos Shale, Disappointment Valley, San Miguel County, Colorado
John B. Reeside, Daniel R. Shawe
1963, Open-File Report 64-143
About 400 fossiliferous segments of drill core from the lower part of the Mancos Shale of Late Cretaceous age were collected by the author during an exploratory drilling program for uranium deposits conducted in 1955 and 1956 by the Geological Survey in the Disappointment Valley area, San Miguel County, Colo. "The samples were submitted to...
Exploratory geophysical traverses in the Oakfield Hills area, Smyrna Mills Quadrangle, Maine
Martin Francis Kane, Randolph Wilson Bromery, Frank C. Frischknecht
1963, Open-File Report 63-71
Ground magnetic, gravity, and electromagnetic measurements in the Oakfield Hills area have delineated a series of steeply dipping, dikelike rock units with high apparent susceptibility, high density, and often high conductivity. The measurements were made to investigate the source of a 3000-gamma aeromagnetic anomaly. The rock units are apparently a...
Placer tin deposits in central Alaska
Robert Mills Chapman, Robert Roy Coats, Thomas G. Payne
1963, Open-File Report 63-15
Placer tin, in the form of cassiterite (Sn02) and (or) tinstone (fragments including cassiterite and some vein or rock material), is known or reported in deposits that have been prospected or mined for placer gold in four areas adjacent to the Yukon River in central Alaska, 120 to 240 miles...