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Image: Mid-Atlantic Appalachian rock types

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Description: Geological map featuring the crystalline and sedimentary rock types in the Mid-Atlantic segment of the Appalachian Mountains. Figure 8 from Ground Water Atlas of the United States: Delaware, Maryland, New Jersey, North Carolina, Pennsylvania, Virginia, West Virginia. Office of Ground Water, United States Geological Survey (1997).
Title: Mid-Atlantic Appalachian rock types
Credit: http://pubs.usgs.gov/ha/ha730/ch_l/L-text1.html Figure 8
Author: Henry Trapp, Jr. and Marilee A. Horn
Permission: materials that originally came from the United States Geological Survey, an agency of the United States Department of the Interior
Usage Terms: Public domain
License: Public domain
Attribution Required?: No

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