Subsurface Trenton and sub-Trenton rocks in Ohio, New York, Pennsylvania and West Virginia
Series: Pennsylvania. Topographic and Geologic Survey. Bulletin G; 21
Publisher: Topographic and Geologic Survey
Published: 1948
Place of publication: [Harrisburg]
Language: eng
Number of pages: 1492
Subjects: Geology, Stratigraphic -- Ordovician.; Geology -- United States.
Notes: "Reprinted from Bulletin of the American Association of Petroleum  Geologists, vol. 32, no. 8."