U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database

Geologic Unit: Gulfian

Usage:

Gulfian Series*


Subunits:

(ascending): Woodbine Formation, Eagle Ford Group, Austin Group, Taylor Group, Navarro Group. See fig. 1 (Hill, 1901) for detailed stratigraphic affiliations.


Geologic age:

Late Cretaceous (Cenomanian to Maastrichtian)*


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

None designated. Described as seen by R.T. Hill from east to west along the line of the Texas Pacific RR from Van Zandt Co., to a point 8 mi west of Arlington, TX (Hill, 1887).


AAPG geologic province:

North America


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