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National Geologic Map Database

NGMDB

Geologic Unit: Austin

Usage:

Austin Group (LA,TX*)
Austin Chalk (FL?,TX)


Subunits:

GROUP STATUS (alphabetical): Atco Formation (TX*), Big House Formation (TX), Blossom Sand (TX*), Bonham Clay (TX), Brownstown Formation (LA,TX) or Brownstown Marl (TX*), Bruceville Formation (TX*), Burditt Formation (TX) or Burditt Marl (TX*), Dessau Formation (TX*), Ector Chalk (LA,TX), Gober Chalk (TX*), Jonah Formation (TX) or Jonah Limestone (TX), McKown Formation (TX), Pflugerville Formation (TX), Rapides Formation (LA), Tokio Formation (LA), Vinson Formation (TX).
FORMATION STATUS (alphabetical): Atco Member (TX), Ector Tongue (TX*), Gober Tongue[?] (TX), Hutchins Member (TX).


Geologic age:

Late Cretaceous (Coniacian to Campanian)*


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

Type area: Travis Co., southeastern TX. Named from Austin, in Travis Co. (US geologic names lexicons, USGS Bull. 896, 1200).
Type section (Austin Group): Austin, Travis Co., TX (see G.E. Murray, 1961, Geol. Atl. and Gulf Coastal Plain prov. North Amer., Harper Bros. Geo. Ser., 692 p.).


AAPG geologic province:

East Texas basin*
Fort Worth syncline*
Gulf Coast basin*
Ouachita folded belt*
Permian basin*
South Oklahoma folded belt*


NGMDB

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 ([ ]).

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