- Usage in publication:
-
- Abel Gap Formation
- Modifications:
-
- Named
- Dominant lithology:
-
- Siltstone
- Sandstone
- Quartzite
- AAPG geologic province:
-
- Piedmont-Blue Ridge province
Summary:
Abel Gap Formation of Talladega Group is here named in northeastern Alabama. Consists of gray siltstone and sandstone with distinctive phyllitic and pyritic quartzite intervals. Thickness ranges from 1500 to 2100 m. Unit overlies Heflin Phyllite (new name) and underlies Chulafinnee Schist (new name), both of Talladega Group. Age is Devonian(?) and older(?). [Author states names are informal.]
Source: GNU records (USGS DDS-6; Reston GNULEX).
- Usage in publication:
-
- Abel Gap Formation
- Modifications:
-
- Overview
- AAPG geologic province:
-
- Piedmont-Blue Ridge province
Summary:
Author states that Abel Gap Formation has been abandoned, its rocks included in the Lay Dam Formation by Tull (1982). Term is used in this report only in direct reference to the interpretations of Bearce (1973 and 1979). Shown in column of Cleburne Co. below Chulafinnee Schist and above Heflin Phyllite, both still in current usage. Author notes, however, that the Heflin is not included in the Talladega Group by Osborne and others (1988).
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 ([ ]).