The geology of Pennsylvania

The geology of Pennsylvania

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a government survey: with a general view of the geology of the United States, essays on coal-formation and its fossils, and a description of the coal-fields of North ... 4.0 6.8 11.0 .5 54.39 Dark cbestnut-brown ; stalactitic pipes almost obliterated.


Title:The geology of Pennsylvania
Author:Pennsylvania. Bureau of Topographic and Geologic Survey, Henry Darwin Rogers, William Barton Rogers, Leo Lesquereux
Publisher: - 1868
ISBN-13:

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