Transactions of the Wagner Free Institute of Science of Philadelphia, Vol. 9

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Excerpt from Transactions of the Wagner Free Institute of Science of Philadelphia, Vol. 9: Part I, May, 1919Just above the laminated cl_ay occurs a thin layer of alternating sand and yellow loam, averaging 2 to 3 feet in thickness. The loam corresponds exactly to that found exposed at many places adjoining the Hackensack marsh, and it is quite probable that the loam, now covered, was at one time continuous with that exposed in neighboring regions. The presence of the sand at dif ferent places is puzzling. It may be the remains of the old sandy sea-beach upon which the present marsh was built by the action of the tide, but this is not at all certain (f ig.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.