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Excerpt from Preliminary Report of the Field-Work of the United States Geological and Geographical Survey of the Territories: For the Season of 1877 Between the Blackfoot Mountains and the Blackfoot River, and occu pying the angle in the southern bend of the Blackfoot, an isolated area of bills exhibits a series of strata, including the Upper Carboniferous on the north to the Jurassic on the south. The middle portion of this sec tion is much disturbed and the exposures unsatisfactory. The former beds incline steeply southward, while in the Jurassic ledges on the south a marked anticlinal fold is observed the strata inclining to the north and south either side of the axis. Stations 12 and 13 were located on ridges on the north side of this fold. The beds in this group of hills have veered round so as to have nearly east and west strike. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

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