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Author : Frank W. Osterwald
Release : 1959
Genre : Bighorn Mountains (Wyo. and Mont.)
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Book Synopsis Structure and Petrology of the Northern Big Horn Mountains, Wyoming by : Frank W. Osterwald
Download or read book Structure and Petrology of the Northern Big Horn Mountains, Wyoming written by Frank W. Osterwald. This book was released on 1959. Available in PDF, EPUB and Kindle. Book excerpt:
Author : John Charles Palmquist
Release : 1961
Genre : Geology, Structural
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Book Synopsis Petrology and Structure of the Horn Area, Bighorn Mountains, Wyoming by : John Charles Palmquist
Download or read book Petrology and Structure of the Horn Area, Bighorn Mountains, Wyoming written by John Charles Palmquist. This book was released on 1961. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Frank W. Osterwald
Release : 1951
Genre : Geology
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Book Synopsis Structural and Petrologic Studies in the Northern Bighorn Mountains, Wyoming by : Frank W. Osterwald
Download or read book Structural and Petrologic Studies in the Northern Bighorn Mountains, Wyoming written by Frank W. Osterwald. This book was released on 1951. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Paul William Richards
Release : 1955
Genre : Bighorn Mountains (Wyo. and Mont.)
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Book Synopsis Geology of the Bighorn Canyon-Hardin Area, Montana and Wyoming by : Paul William Richards
Download or read book Geology of the Bighorn Canyon-Hardin Area, Montana and Wyoming written by Paul William Richards. This book was released on 1955. Available in PDF, EPUB and Kindle. Book excerpt:
Author : C. E. Whipkey
Release : 1991
Genre : Geology
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Book Synopsis Uplift of the Bighorn Mountains, Wyoming and Montana by : C. E. Whipkey
Download or read book Uplift of the Bighorn Mountains, Wyoming and Montana written by C. E. Whipkey. This book was released on 1991. Available in PDF, EPUB and Kindle. Book excerpt: Fluvial and lacustrine-dominated clastic sedimentary rocks as thick as 1,800 m (6,000 ft) comprise the Paleocene Fort Union Formation and the Eocene Wasatch Formation of the western Powder River Basin in northeastern Wyoming and southeastern Montana. The systematic mineralogy of 45 samples of channel-fill sandstone from this sequence reflects the uplift and erosion of the Bighorn Mountains. Samples were collected to study vertical changes in the mineralogy of lower Tertiary sandstones adjacent to the Bighorn Mountains, lateral variations in the composition of the upper Paleocene Tongue River Member of the Fort Union Formation along the eastern front of the mountains, and variations in the composition of equivalent upper Paleocene sandstones of the central and western parts of the basin. Vertical changes in the mineralogy of a succession of Paleocene and Eocene sandstone units adjacent to the Bighorn Mountains most likely were produced by uplift and sequential erosion of the rocks that formerly overlaid the mountains. Uplift probably began in the middle Paleocene, during deposition of the Lebo Member of the Fort Union Formation, and continued into the Eocene. Differences in the mineralogy of the sandstone units along the western edge of the Powder River Basin that correspond to differences in the rock types now exposed along the crest of the Bighorn Mountains suggest that much of the erosional degradation of the Bighorn Mountains occurred during an early Tertiary tectonic episode. Lateral changes in the suite of unstable detrital grains within the Tongue River Member are compatible with facies and paleotransport studies that indicate a substantial eastward flux of detritus of early Tertiary age from the Bighorn Mountains into the central Powder River Basin.
