Usage:
Breadtray Granite of /St. Francois Mountains Intrusive Suite (MO-local)
[?] Breadtray facies (informal) in Butler Hill Granite of /St. Francois Mountains Intrusive Suite (MO-local)
Recognized locally in St. Francois Mountains area.
For informal usage, the rank or lithologic term should not be capitalized. [Name St. Francois Mountains applied concurrently to two different units in same area (see ACSN, 1970; NACSN, 1983, 2005, 2021).]
Geologic age:
Precambrian
Type section, locality, area and/or origin of name:
Typically exposed from just west of Doe Run, St. Francois Co., south to Roselle, Madison Co., MO. Named from exposures on Bread Tray Mountain, St. Francois Co., MO (Tolman and Robertson, 1969).
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 ([ ]).