Usage:
Ramp Creek Formation of Sanders Group (IN)
Ramp Creek Limestone Member of Muldraugh Formation (IN)
Ramp Creek Member of Ullin Limestone (IL,IN)
Geologic age:
Mississippian, Early
Osagean
Mississippian, Late
Meramecian
Type section, locality, area and/or origin of name:
Not designated. Exposed in ravine tributary to Ramp Creek southeastern part of Monroe Co., IN.
AAPG geologic province:
Illinois 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 ([ ]).