Usage:
Cass Limestone of Douglas Group (IA,NE)
Cass Formation of Douglas Group (MO)
Subunits:
(alphabetical) --all in NE: Haskell Limestone Member, Little Pawnee Shale Member, Shoemaker Member.
Geologic age:
Late Pennsylvanian (Virgilian)
Type section, locality, area and/or origin of name:
Platte River bluffs and Burlington quarries located 1.5 to 2 mi northwest of South Bend, Cass Co., NE. Origin of name not stated by author, but probably named from Cass Co., NE (Condra, 1927).
AAPG geologic province:
Forest City basin
Nemaha anticline
Salina 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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).