Usage:
No current usage.
(†Skrainka Diabase (MO-recognized locally in St. Francois Mountains area) considered abandoned.)
Geologic age:
Precambrian
Type section, locality, area and/or origin of name:
Typically developed at Skrainka quarry, in sec. 3, T. 33 N., R. 6 E., Madison Co., MO.
AAPG geologic province:
Midcontinent 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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).