Usage:
Aarde Shale Member of Howard Limestone of Wabaunsee Group (IA,KS*)
Aarde Shale of Ada Group (OK)
Aarde Shale Member of Howard Formation of /Sacfox subgroup [informal] of Wabaunsee Group (MO)
["Subgroup" not recognized as a formal stratigraphic rank term (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). Sacfox subgroup considered informal and should not be capitalized.]
Geologic age:
Late Pennsylvanian (Virgilian)*
Type section, locality, area and/or origin of name:
Type locality: Aarde Farm, in NW/4 NE/4 sec. 4, T. 26 S., R. 11 E., Greenwood Co., KS (Moore, 1932; 1936).
AAPG geologic province:
Chautauqua platform*
Cherokee basin*
Nemaha anticline*
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 ([ ]).