- Usage in publication:
-
- Pokeberry cyclothem
- Modifications:
-
- Original reference
- AAPG geologic province:
-
- Illinois basin
Summary:
(fig. 22), p. 60, 113, 180, 190. Pokeberry cyclothem [in Carbondale group]. Thickness 11 to 17 feet. Includes Pokeberry limestone. In sequence, occurs above Brereton cyclothem and below Sparland cyclothem. May be equivalent to Jamestown cyclothem. [Age is Pennsylvanian.]
Named from outcrops about 1 mi east of Pokeberry School, in sec. 26, T. 2 N., R. 1 W., Beardstown 15-min quadrangle, Schuyler Co., central western IL.
Source: US geologic names lexicon (USGS Bull. 1200, p. 3083).
- Usage in publication:
-
- Pokeberry cyclothem
- Modifications:
-
- Not used
- AAPG geologic province:
-
- Illinois basin
Summary:
Pg. 56 (table 3). Pokeberry cyclothem [in Carbondale group]. Replaced with Jamestown cyclothem.
Source: US geologic names lexicon (USGS Bull. 1200, p. 3083).
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 ([ ]).