National Geologic Map Database
General Information
- Title: Revised ages of Cambrian and Ordovician formations of the Conestoga Valley near York and Lancaster, southeastern Pennsylvania
- Author(s): Gohn, G.S.
- Publishing Organization: U.S. Geological Survey
- Series and Number: Bulletin 1457-A [p. 94-97]
- Larger Work: Sohl, N.F. and Wright, W.B., Changes in stratigraphic nomenclature by the U.S. Geological Survey, 1977
- Publication Date: 1978
- Map Scale: 1:1,485,656
- Cross Section: None
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