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Author
Butts, Charles, 1863-1946. (1)
SubjectCarboniferous - Monongahela formation; Conemaugh formation; Saltsburg sandstone; Ebensburg sandstone; Summerhill sandstone; Wilmore sandstone; Allegheny formation; Pottsville formation; Mauch Chunk formation; Pocono formation (1)
Devonian - Catskill formation; Chemung formation; Nunda formation; Genesee shale; Hamilton formation (1)
Geology -- United States --Maps (1)
Geology--Pennsylvania--Maps (1)
Neogene - unnamed strata (1)
... View MoreDate Issued1905 (1)Type
Book (1)
Image (1)
Map (1)
Has File(s)Yes (1)