- Usage in publication:
-
- Prices Falls Member
- Modifications:
-
- Named
- Dominant lithology:
-
- Shale
- Marl
- AAPG geologic province:
-
- South Oklahoma folded belt
- Arkoma basin
Summary:
Prices Falls Member, lower member of Clarita Formation of Chimneyhill subgroup [informal] of Hunton Group. At type section, the Prices Falls consists of 2 feet of green and red, slightly fissile shale, overlain by Fitzhugh Member and unconformably underlain by either Cochrane Formation or Keel Formation, all included in Chimneyhill. Beds have yielded conodonts that indicate an Early Silurian (late Llandoverian) age.
Type section: at Prices Falls, in SW/4 NW/4 sec. 33, T. 1 S., R. 2 E., Murray Co., south-central OK. Named from exposures at Prices Falls, about 2 mi east of U.S. Highway 77 in Murray Co., south-central OK.
["Subgroup" not recognized as a formal stratigraphic rank term (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). Considered informal and should not be capitalized.]
Source: US geologic names lexicon (USGS Bull. 1350, p. 599); supplemental information from 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 ([ ]).