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184743 results.

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Publication Extents

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A postglacial chronology for some alluvial valleys in Wyoming
Luna Bergere Leopold, John P. Miller
1954, Water Supply Paper 1261
Alluvial terraces were studied in several major river basins in eastern Wyoming. Three terraces are present along nearly all the streams and large tributaries. There are several extensive dissected erosion surfaces in the area, but these are much older than, and stand well above, the recent alluvial terraces with which...
Geology of parts of the Johnny Gulch quadrangle, Montana
Val L. Freeman
1954, Open-File Report 54-92
An area of about 35 square miles, situated about 30 miles southeast of Helena, Montana, was mapped during the summer of 1952 at a scale of l:24, 000. The area includes a part of the eastern foothills of the Elkhorn Mountains, and is underlain by sedimentary mad volcanic rocks of...
Progress report (1953) on the revision of Washington's Chemical analyses of igneous rocks (U.S.G.S. Prof. Paper 99), presented at the First International Symposium on Geochemistry, under the auspices of the International Union of Chemistry, in Zurich, August 11-13, 1953
Marjorie Hooker
1954, Open-File Report 54-129
In October of last year, vhen I was here in Zurich, it was my privilege to talk with Professor Niggli about the revision of Washington's "Chemical analysis of igneous rocks" which the United States Geological Survey is undertaking. It was then that he suggested the possibility of a progress report...
Fusion of arkosic sand by intrusive andesite
Roy A. Bailey
1954, Open-File Report 54-14
An andesite dike in the Valles Mountains of northern New Mexico has intruded and partly fused arkosic sediments for a distance of 50 feet from its contacts. The dike is semi-circular in form, has a maximum width of about 100 feet, and is about 500 feet long. Small associated arcuate...