Disintegration boulders, in place, surrounded by soft sandy disintegrated granite. Jefferson County, Montana. 1900.
Dates
Date Taken
1900
Summary
Disintegration boulders, in place, surrounded by soft sandy disintegrated granite, shows manner of formation of the boulders and their relation to sheeting planes of the granite. Railway cut at west portal of Homestake tunnel, east of Butte, on Northern Pacific railway. Jefferson County, Montana. Circa 1900. Plate 5-B in U.S. Geological Survey. Professional paper 74. 1912.
Summary
Disintegration boulders, in place, surrounded by soft sandy disintegrated granite, shows manner of formation of the boulders and their relation to sheeting planes of the granite. Railway cut at west portal of Homestake tunnel, east of Butte, on Northern Pacific railway. Jefferson County, Montana. Circa 1900. Plate 5-B in U.S. Geological Survey. Professional paper 74. 1912.
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