- Usage in publication:
-
- Friendsville coal member
- Modifications:
-
- Original reference
- Dominant lithology:
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- Coal
- AAPG geologic province:
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- Illinois basin
Summary:
Pg. 40, 51 (table 1), pl. 1. Friendsville coal member of Mattoon formation (new) of McLeansboro group. Assigned member status in Mattoon formation. Occurs at base of formation about 50 feet below McClearys Bluff coal member. Coal named by Fuller and Clapp (1904, USGS Geol. Atlas of the US, Patoka folio, no. 105). Age is Pennsylvanian. Presentation of new rock-stratigraphic classification of Pennsylvanian of Illinois.
Type locality: in secs. 13 and 24, T. 1 N., R. 13 W., Wabash Co., IL.
Source: US geologic names lexicon (USGS Bull. 1200, p. 1432).
- Usage in publication:
-
- Friendsville Coal Member*
- Modifications:
-
- Overview
- AAPG geologic province:
-
- Illinois basin
Summary:
Paleobotanic and palynologic data from the Friendsville Coal Member of the Mattoon Formation in IL show that tree-fern species were the most dominant flora in coal swamps represented by this unit. The Friendsville Coal Member is 0.7 to 1.2 m thick and overlies the Millersville Limestone Member or Livingston Limestone Member of the Bond Formation. The Friendsville is of Late Pennsylvanian (Missourian) age.
Source: GNU records (USGS DDS-6; Reston 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 ([ ]).