Contributions to the Geology of Eastern Massachusetts (Classic Reprint)

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Excerpt from Contributions to the Geology of Eastern Massachusetts I resolved, however, partly on the suggestion of Prof. Hyatt, to test my conclusions by another year of field work, and various circumstances have conspired to extend this time to nearly two years. By this means my original observations have been doubled, and, although the general plan of the paper remains the same, it far exceeds its former limits, and many of the geological boundaries on the map have been brought nearer to an expression of the truth. In deference to the View of Dr. T. Sterry Hunt, expressed to me personally, and before this Society, I have given the rocks, which in the original paper were designated as the Norian system, a name having no chronological signification. The Huronian petrosilex and felsite are no longer regarded as synchronous with the breccias, but the latter rocks, together with the amygdaloids, which appear to belong to the same horizon, are set apart as a distinct formation under the name of the Shawmut group. The conglomerates about Boston have been found to underlie the slates, and hence are now regarded as Primordial instead of Carboniferous. 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.