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Excerpt from A Dissertation Upon the Origin of Mineral Coal Descending in the natural order, next come the tertiary formati'ons, made up of stratified beds of clay, limestone and other rocks. Stil'l farther down in the body of the earth, we strike the cretaceous group. 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.