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The Eastern Front of the Bitterroot Range, Montana

Description: From abstract: The origin of the gneissic rocks on the eastern border of the Idaho batholith in the Bitterroot Range, near Hamilton, Mont., has long been in dispute. Lindgren regarded these rocks as the product of stresses related to a normal fault along the front of the range with an eastward dip of about 150. He thought both the hanging wall and the footwall had moved, with a total displacement along the fault plane of at least 20,000 feet. The faulting was believed to have been so recent as … more
Date: 1952
Creator: Ross, Clyde P.
Partner: UNT Libraries Government Documents Department
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Volcanic Activity in the Aleutian Arc

Description: Including a list of all known volcanoes and a summary of activity betwen 1760 and 1948.
Date: 1950
Creator: Coats, Robert R.
Partner: UNT Libraries Government Documents Department
open access

Pleistocene and Recent Deposits in the Denver Area, Colorado

Description: This report describes the stratigraphy of Pleistocene and Recent deposits in the Denver area, Colorado that was conducted intermittently between 1948-52.
Date: 1954
Creator: Hunt, Charles B.
Partner: UNT Libraries Government Documents Department
open access

Surficial Geology of the Louisville Quadrangle, Colorado

Description: This report analyzes surficial deposits in the Louisville quadrangle, Colorado, that are divided into three main groups--pre-Wisconsin, Wisconsin, and Recent.
Date: 1955
Creator: Malde, Harold E.
Partner: UNT Libraries Government Documents Department
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