Eocene.

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Bibliographic Details
Corporate Author: Maryland Geological Survey
Other Authors: Clark, William Bullock, 1860-1917
Format: Book
Language:English
Published: Baltimore, The Johns Hopkins press, 1901.
Subjects:
Description
Item Description:"The first of a series of reports dealing with the systematic geology of Maryland."
Physical Description:331, [1] p. LXV pl. (incl. map) 26 cm.
Bibliography:Bibliography: p. 31-43.