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National Geologic Map Database

Geologic Unit: Chappel

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 usage by the U.S. Geological Survey. Other usages by state geological surveys.

"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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).