Antes Shale (MD*)
Antes Shale of Trenton Group (PA,WV*)
Antes Formation (PA*)
probably Middle Ordovician (late Shermanian) and Late Ordovician (early Edenian)*
Type section: east bank of Antes Creek in immediate vicinity of U.S. Route 41 and PA Route 880 intersection, northwest part, Nippenose Valley (see Faill and others, 1977).
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