U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database

Geologic Unit: Catskill

Usage:

Catskill Formation (MD*,NY*,WV)
Catskill Formation of Susquehanna Group (PA*)
Catskill Red Beds (NY,OH*)
Catskill Red Beds of Susquehanna Group (PA*)


Subunits:

(alphabetically): Members vary regionally: Analomink Red Shale Member (PA*), Beaverdam Run Member (PA*), Berry Run Member (PA*), Buddys Run Member (PA*), Cherry Ridge Member (PA*), Clarks Ferry Member (PA*), Damascus Member (PA*), Delaware River Member (NY*,PA*), Duncannon Member (PA*), Dyberry Conglomerate Bed (PA), Elk Mountain Sandstone Member (PA), Honesdale Sandstone Member (PA*), Irish Valley Member (PA*), Kings Mill Sandstone Member (PA), Lackawaxen Member (PA*), Long Run Member (PA*), Montrose Red Beds (PA), Packerton Member (PA*), Pimple Hill Conglomerate Bed (PA), Poplar Gap Member (PA*), Sawmill Run Member (PA*), Sherman Creek Member (PA*), Shohola Member (PA*), Towamensing (PPA*), Walcksville Member (PA*)


Geologic age:

Devonian, Middle*
Devonian, Late*
Mississippian, Early*


Type section, locality, area and/or origin of name:

Not designated. Named from Catskill Mountains, Greene Co., east-central NY (Mather, 1840).


AAPG geologic province:

Appalachian basin*


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates published by U.S. Geological Survey authors.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

Slash (/) indicates name does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).