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National Geologic Map Database

Geologic Unit: Millican

Usage:

No current usage.
(†Millican Formation (TX) replaced with Allamoore Limestone and Hazel Sandstone. See Allamoore and Hazel.)


Geologic age:

Precambrian


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

Named from Millican's Ranch, 10 mi northwest of Van Horn, [Hudspeth Co.], Sierra Diablo region, TX (Richardson, 1914).


AAPG geologic province:

Southwestern Basin-and-Range region


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 ([ ]).