- Usage in publication:
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- Heflin phyllite
- Modifications:
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- Named
- Dominant lithology:
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- Phyllite
- AAPG geologic province:
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- Piedmont-Blue Ridge province
Summary:
Heflin phyllite named in Cleburne Co., east-central AL. [Author states name is informal.] Described as green, gray, and bluish gray calcareous sandy siltstone and sandstone, with basal conglomerate. Underlies Abel Gap Formation (new name). Age is Paleozoic.
Source: GNU records (USGS DDS-6; Reston GNULEX).
- Usage in publication:
-
- Heflin phyllite
- Modifications:
-
- Overview
- AAPG geologic province:
-
- Piedmont-Blue Ridge province
Summary:
Lay Dam Formation lithologically resembles the Heflin phyllite (of Bearce, 1973). Both formations are stratigraphically overlain by the Cheaha Quartzite (Butts, 1926) (Abel Gap Formation of Bearce, 1973). The Lay Dam unconformably overlies units as young as Early Ordovician, most noticeably the Sylacauga Marble Group. The Heflin-Chilhowee contact may also be unconformable, and if so, the Heflin should probably be renamed Lay Dam.
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 ([ ]).