Usage:
Chappel Limestone (TX*)
Chappel Formation (TX)
Subunits:
(alphabetical) --all in TX: Espey Creek Member, Ives Conglomerate Member, Whites Crossing Coquina Member.
Geologic age:
Mississippian, Early*
Type section, locality, area and/or origin of name:
Type locality: 3 mi southeast of San Saba. [Geographic feature not mentioned, but there is a village called Chappel southeast of San Saba] (Sellards, 1933).
AAPG geologic province:
Llano uplift*
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 ([ ]).