Usage:
Pope Group (IL)
Subunits:
Aux Vases Sandstone, Golconda Formation, Hardinsburg Sandstone, Glen Dean Limestone, Tar Springs Sandstone, Vienna Limestone, Waltersburg Formation, Menard Limestone, Palestine Sandstone, Clore Formation, Degonia Formation, and Kinkaid Limestone
Geologic age:
Mississippian, Late
Meramecian
Chesterian
Type section, locality, area and/or origin of name:
Type area: Pope Co., Illinois (Swann and Willman, 1961).
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 ([ ]).