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Author
Campbell, Marius R. (Marius Robinson), 1858-1940. (1)
Subject
Carboniferous - Dunkard formation; Monongahela formation; Conemaugh formation; Saltsburg sandstone; Allegheny formation; Pottsville sandstone; Mauch Chunk formation; Greenbrier limestone; Pocono sandstone (1)
Geology -- United States --Maps (1)Geology--Pennsylvania--Indiana County--Maps (1)Geology--Pennsylvania--Westmoreland County--Maps (1)Neogene - Carmichaels clay (1)... View MoreDate Issued1904 (1)Type
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