National Geologic Map Database
General Information
- Title: Stratigraphic framework of Cambrian and Ordovician rocks in the central Appalachian basin from Lake County, Ohio, to Juniata County, Pennsylvania [Revised by R.D. Crangle, Jr., 2002]
- Author(s): Ryder, R.T.
- Publishing Organization: U.S. Geological Survey
- Series and Number: Miscellaneous Investigations Series Map I-2200 [1 sheet]
- Publication Date: 1992
- Map Scale: 1:3,168,000
- Cross Section: Yes
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