- Usage in publication:
-
- Missouri Mountain formation
- Modifications:
-
- Original reference
- Dominant lithology:
-
- Novaculite
- Sandstone
- Shale
- AAPG geologic province:
-
- Ouachita folded belt
Summary:
Pg. 557. Missouri Mountain formation. Novaculite, sandstone, and shale overlying Slatington shale and composing top formation of Ouachita Ordovician area in southwestern Arkansas. Slatington shale and Missouri Mountain formation may possibly be of Silurian age.
[GNC remark (ca. 1936, US geologic names lexicon, USGS Bull. 896, p. 1389): †Missouri Mountain formation abandoned. As here defined the name was applied to beds which Purdue later in 1909 named Arkansas novaculite and Fork Mountain slate. The Arkansas novaculite is of Middle and Late Devonian(?) age; the †Fork Mountain slate is of Pennsylvanian age, and is now included in Stanley shale.]
Source: US geologic names lexicon (USGS Bull. 896, p. 1389).
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 ([ ]).