National Geologic Map Database
General Information
- Title: Ordovician clastic sedimentary rocks in Pennsylvania
- Author(s): Willard, Bradford
- Publishing Organization: Geological Society of America
- Series and Number: Bulletin v. 54 no. 8 [p. 1067-1122]
- Publication Date: 1943
- Map Scale: 1:2,837,017
- Cross Section: Yes
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