Upper Devonian marine-nonmarine transition, southern Pennsylvania
By: by Roger G. Walker.
Series: General geology report [G]62; General geology report ;; 62.
Publisher: [Commonwealth of Pennsylvania, Bureau of Topographic and Geologic Survey]
Published: 1972
Place of publication: Harrisburg
Language: eng
Number of pages: 25
Subjects: Geology, Stratigraphic -- Devonian.; Geology -- Pennsylvania.
Notes: Bibliography: p. 25.
Part of illustrative matter in pocket.
"Pennsylvania Geological Survey fourth series."