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National Geologic Map Database

Geologic Unit: Chispa Summit

Usage:

Chispa Summit Formation (TX*)
Chispa Summit Formation of Eagle Ford Group (TX*)


Geologic age:

Late Cretaceous (Cenomanian to Turonian)*


Type section, locality, area and/or origin of name:

In the headwaters of Van Horn Creek on the Johnson and Colquitt ranches, in the neighborhood of Needle Peak, western Jeff Davis Co., TX (Adkins, 1933).


AAPG geologic province:

Permian basin*


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 ([ ]).