- Usage in publication:
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- Jonah limestone
- Modifications:
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- First used
- Dominant lithology:
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- Limestone
- AAPG geologic province:
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- Ouachita folded belt
Summary:
First used as a formation (fourth of eight) of type Austin group in vicinity of Austin, TX in Ouachita tectonic belt province. Attributed to Durham (1957, unpublished). No type locality designated; derivation of name not given. According to Durham, Jonah unconformably overlies Vinson chalk, intertongues with Hutchins chalk to the north, and unconformably underlies Schwertner limestone in the type Austin sequence. Age is Austinian (Late Cretaceous).
Source: GNU records (USGS DDS-6; Denver GNULEX).
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 ([ ]).