National Geologic Map Database
General Information
- Title: The work of the survey, 1919-1922
- Author(s): Ashley, G.H.
- Publishing Organization: Pennsylvania Geological Survey
- Series and Number: Miscellaneous Papers 2 [18 p.]
- Publication Date: 1923
- Cross Section: None
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Geologic units referred to in Geolex
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- Pennsylvania Geological Survey
- 3240 Schoolhouse Rd.
- Middletown, PA 17057-3534
- Phone: (717) 702-2017
* Names and boundaries are not necessarily authoritative, and are provided here solely for general orientation.