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Gratacap Geology of New York

Book Name: Geology of New York

Author: Gratacap

published: 1909

The Third Edition of the Geology of the City of New York is much enlarged over the Second: first, through the necessary additions of further geological studies of Manhattan Island by various investigators, and second, through the desirable ex­tension of the geology of Brooklyn Borough, which is made the justification of epitomizing the geology of Long Island. The mineralogical detail has been more fully given, and, in a few expository sections, brief outlines of the Second Edition have undergone apposite elaboration. The author acknowledges the courteous assistance of the United States Geological Survey, by valuable loans of orig­inal drawings; that of the State Geologist of New York, through his permission to copy an outline map of a hypotheti­cal glacial condition on Long Island, presented by Professor J. B. Woodworth; and that of Dr. Wallace G. Levison, in the use of plates to illustrate his unique find of Chrysoberyl on Manhattan Island.

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Gratacap Geology of New York