Piedmont district of Pennsylvania
By: by F. Bascom.
Publisher: Published by the Society
Published: 1905
Place of publication: Rochester
Language: eng
Number of pages: 328
Subjects: Geology -- Pennsylvania.; Geology, Stratigraphic.; Geological time.
Notes: From : "Bulletin of the Geological Society of America. Vol.16, pp.289-328, Pls.48-64".

Title from cover.