Usage:
Sweetland Creek Shale (IL*,IA*)
Sweetland Creek Formation of Yellow Spring Group (IA)
Sweetland Creek Shale Member of New Albany Shale of Knobs Group (IL-southern part)
Sweetland Creek Member of New Albany Shale (KY)
[?] Sweetland Creek Shale of New Albany Group (IL*)
Geologic age:
Late Devonian (Frasnian)*
Type section, locality, area and/or origin of name:
Named from exposures along Sweetland Creek, about 4 mi from Muscatine, Muscatine Co., southeastern IA (US geologic names lexicons, USGS Bull. 896, 1200).
AAPG geologic province:
Illinois 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 ([ ]).