The information on these maps is preliminary and questionable areas have not been field checked for accuracy. The mapping was done at a level of detail that was compatible for compilation, at 1:250,000 scale, of The Butte 2° quadrangle, Montana. Slightly more detailed study was made on the overthrust-fault zone of the Garnet Range, however. These maps do not represent the standards of mapping common to U.S.G.S. 1:24,000 quadrangles, and these maps should be considered as rough-draft field compilations.
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