SEDIS - Thesaurus
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Catskill Format
Catskill Formation
BT
Chronostratigraphic Units
.
Phanerozoic
..
Paleozoic
...
Catskill Formation
RT
Devonian
Virginia
Pennsylvania
New York
Maryland
Lower Mississippian
SN
Middle Devonian to Lower Mississippian. In Susquehanna Group. Indexed with ages as applicable.
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