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

Geologic Unit: Crystal City

Usage:

Crystal City sandstone [informal] (MO)
Called Crystal in some early reports.
(†Crystal City Sandstone abandoned by the USGS. Is same as part of St. Peter Sandstone and Roubidoux Formation. See also St. Peter and Roubidoux.)

Considered informal by the MO Geol. Survey. The rank or lithologic term should not be capitalized.


Geologic age:

Ordovician


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

Named from Crystal City, Jefferson Co., eastern MO (US geologic names lexicons, USGS Bull. 896, 1200).


AAPG geologic province:

Ozark uplift


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 ([ ]).