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

Geologic Unit: Texas City

Usage:

Texas City member (informal) of Equality Formation (IL)

Informal. The rank or lithologic term should not be capitalized.


Geologic age:

Pleistocene (Wisconsinan Age)*


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

Not designated. Occurs Saline River valley, southern IL (Heinrich, 1982; Esling, 1991).


AAPG geologic province:

Illinois basin


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 ([ ]).