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BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Devonian
 ....Middle Devonian
 .....Hamilton Group
RTPennsylvania
 New York
 Maryland
 West Virginia
 Ludlowville Formation
 Mahantango Formation
 Marcellus Shale
 Moscow Formation
 Onondaga Limestone
SNDivisions include Onondaga Limestone, Marcellus Shale, Mahantango Formation, Speeds Formation, Deputy Formation, Silver Creek Formation, Swanville Formation, Beachwood Formation, Backoven (Bakoven) Shale, Mount Marion Formation, Ashokan Formation, Kiskato