Category:Wissahickon Schist

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English: Also: Wissahickon Formation; but in Maryland, the formation now has been divided into smaller units and the term "Wissahickon" is no longer used to indicate the stratigraphic unit in this state
<nowiki>Wissahickon Formation; mapped bedrock unit in Pennsylvania, New Jersey, and Delaware</nowiki>
Wissahickon Formation 
mapped bedrock unit in Pennsylvania, New Jersey, and Delaware
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  • Glenarm Group
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