No current usage.
(†Preston Limestone of Wabaunsee Group (NE) replaced with Elmont limestone, Harveyville shale, and Reading limestone. See Elmont, Harveyville, and Reading.)
Pennsylvanian
Near level of railroad at the bridge west of Preston, Richardson Co., NE (Condra and Bengtson, 1915).
Forest City 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 ([ ]).