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165626 results.

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Geology and ground-water resources of the lower Bighorn Valley, Montana
Louis J. Hamilton, Q.F. Paulson
1968, Water Supply Paper 1876
The Bighorn River has incised a deep, broad valley in Cretaceous strata along its 65-mile lower reach below the mouth of Bighorn Canyon in south-central Montana. It ceased downcutting at six different levels 100-200 feet apart, widening its flood plain and alluviating each level with about 30 feet of sandy...
Direct-current arc and alternating-current spark emission spectrographic field methods for the semiquantitative analysis of geologic materials
D. J. Grimes, A. P. Marranzino
1968, Circular 591
Two spectrographic methods are used in mobile field laboratories of the U. S. Geological Survey. In the direct-current arc method, the ground sample is mixed with graphite powder, packed into an electrode crater, and burned to completion. Thirty elements are determined. In the spark method, the sample, ground to pass...
Generalized hydrology of prairie potholes on the Coteau du Missouri, North Dakota
William Stewart Eisenlohr, Charles E. Sloan
1968, Circular 558
This report presents all the information, obtained during the investigation, that lends itself to generalization. It describes conditions on that part of the Coteau du Missouri where there is little integration of drainage systems. The surface of the glacial drift in this region is dotted with shallow depressions known as...
Distribution of beryllium, tin, and tungsten in the Lake George area, Colorado
C. C. Hawley, Wallace R. Griffitts
1968, Circular 597
Complex ore deposits are spatially associated with granitic bodies of Precambrian age in the Lake George area, Colorado. They include greisens that contain high concentrations of beryllium and subordinate amounts of tin, tungsten, and other metals associated with the Redskin Granite. Scheelite deposits in calc-silicate rocks and greisen deposits near Tappan Mountain...