Usage:
Heumader Shale Member of Oread Formation of Shawnee Group (IA*,MO*,NE*)
Heumader Shale Member of Oread Limestone of Shawnee Group (KS*)
Geologic age:
Late Pennsylvanian (Virgilian)*
Type section, locality, area and/or origin of name:
Heumader quarry, bluffs of Missouri River just north of St. Joseph, Buchanan Co., northwestern MO (Moore, 1936).
AAPG geologic province:
Forest City basin*
Iowa shelf*
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 ([ ]).