Pennsylvanian of the Northern Mid-Continent Region (Classic Reprint)

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Excerpt from Pennsylvanian of the Northern Mid-Continent RegionThe aggregate thickness of the Pennsylvanian in the northern part of the mid-continent region is to feet (610 to 914 meters). Southward there is a gradual increase in thickness to about feet meters) in eastern Oklahoma and west-central Arkansas. The total thickness of the Pennsylvanian in north-central Texas is approximately feet 24 meters).The general nature of these rocks in the northern and southern parts of the mid-continent region is essentially the same. The outstanding characters are the relative abundance of marine sediments, the extreme persistence and lateral uniformity of most of the stratigraphic units, and the occurrence of many comparatively thin formations of alternating shale, limestone, sandstone, and a few coal beds.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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.