Usage:
Erin Shale (AL*)
Erin Slate of Talledega Group (AL)
Erin Shale Member of Talledega Slate (AL)
Erin Slate Member of Lay Dam Formation (AL*)
Geologic age:
Paleozoic, late*
Devonian(?)
Mississippian(?)
Type section, locality, area and/or origin of name:
Vicinity of Erin, Clay Co., east-central AL (Butts, 1926).
AAPG geologic province:
Appalachian 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 ([ ]).