Usage:
Larsh Shale Member of Deer Creek Limestone of Shawnee Group (IA,KS*,NE*)
Larsh Shale Member of Deer Creek Formation of Shawnee Group (MO)
Also called /Larsh-Burroak shale member [informal] of Deer Creek Formation of Shawnee Group.
[The use of a hyphen between undifferentiated [members] is not considered proper notation (CSN, 1933).]
Geologic age:
Late Pennsylvanian (Virgilian)*
Type section, locality, area and/or origin of name:
Not designated Named from the Larsh Farm, on Ervine Creek, northeast of Union, Cass Co., NE (Condra, 1927).
AAPG geologic province:
Nemaha anticline*
Forest City 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 ([ ]).