Geologic units in Haralson county, Georgia

Additional scientific data in this geographic area

Phyllite and Quartzite (Precambrian-Paleozoic) at surface, covers 54 % of this area

Phyllite and Quartzite

Garnet Mica Schist (Precambrian-Paleozoic) at surface, covers 19 % of this area

Garnet Mica Schist

Graphite Schist (Precambrian-Paleozoic) at surface, covers 11 % of this area

Graphite Schist

Granite Gneiss/ Granite (Precambrian-Paleozoic) at surface, covers 5 % of this area

Granite Gneiss/ Granite

Phyllite undifferentiated (Precambrian-Paleozoic) at surface, covers 4 % of this area

Phyllite undifferentiated

Amphibolitic Schist/ Amphibolite (Precambrian-Paleozoic) at surface, covers 3 % of this area

Amphibolitic Schist/ Amphibolite

Hornblende Gneiss/ Amphibolite (Precambrian-Paleozoic) at surface, covers 2 % of this area

Hornblende Gneiss/ Amphibolite

Quartzite (Precambrian-Paleozoic) at surface, covers 0.5 % of this area


Sericite Schist (Precambrian-Paleozoic) at surface, covers 0.4 % of this area

Sericite Schist

Gabbro (Precambrian-Paleozoic) at surface, covers 0.1 % of this area


Talladega Group; Lay Dam Formation (Silurian?-Devonian) at surface, covers < 0.1 % of this area

Interbedded dark-green phyllite, medium-gray to light-brown and black metasiltstone, dark-green feldspathic metagraywacke, and light-gray and dark-gray medium to coarse-grained arkosic quartzite and metaconglomerate; graphitic phyllite common in upper part. In Cleburne and Calhoun Counties, rocks mapped as the Lay Dam include the Abel Gap Formation of Bearce (1973) and consist of interbedded greenish-gray metasiltstone and quartzite, black phyllitic metasiltstone, medium-gray to greenish-gray arkosic quartzite, and dark-gray pyritic quartzite. In Clay Chounty the upper part of the Lay Dam includes black graphitic sericite phyllite and slate reportedly containing plant fossils (Erin Slate Member).

Wedowee Group; Wedowee Group undifferentiated (Precambrian to Paleozoic) at surface, covers < 0.1 % of this area

Wedowee Group undifferentiated includes the Cragford Phyllite and Cutnose Gneiss. Cragford Phyllite -- interbedded fine-grained graphite-chlorite-sericite schist and phyllite, garnet-sericite schist and phyllite, graphite-quartz-sericite phyllite, locally feldspathic biotite gneiss, calc-silicate rock, and quartzite. Cutnose Gneiss -- cyclically interbedded fine-grained quartz-biotite feldspathic gneiss, graphite-chlorite-sericite schist, locally thin interbeds of graphite-quartz-sericite phyllite, and quartzite. Rocks in the area northeast of Clanton in Chilton and Coosa Counties that are here assigned to the Wedowee Group also have been interpreted as part of the Higgins Ferry Group.

Talladega Group; Jemison Chert and Chulafinnee Schist undifferentiated (Silurian?-Devonian) at surface, covers < 0.1 % of this area

Grayish-white to yellowish-orange massive, thick-bedded, fine-grained, locally argillaceous, locally fossiliferous metachert and light to dark-greenish-gray fine to medium-grained fissile quartz-sericite-chlorite phyllite and schist which locally includes thin chlorite phyllite and quartzose phyllite beds.