- Usage in publication:
-
- Palmetto granite
- Modifications:
-
- Named
- Dominant lithology:
-
- Granite
- AAPG geologic province:
-
- Piedmont-Blue Ridge province
Summary:
Porphyritic biotite granite near Palmetto, Fulton Co., northwest GA, here referred to as Palmetto granite. Closely resembles Stone Mountain type except that it includes many phenocrysts of feldspar, generally microcline. In Greene and Elbert Cos., gradational into Stone Mountain type, and one appears to be simply a phase of the other. In Greene Co., porphyritic type predominates, and in Elbert Co. equigranular type is most common. Age generalized as Paleozoic.
Source: GNU records (USGS DDS-6; Reston GNULEX).
- Usage in publication:
-
- Palmetto Granite*
- Modifications:
-
- Age modified
- Geochronologic dating
- AAPG geologic province:
-
- Piedmont-Blue Ridge province
Summary:
Palmetto Granite as used by Crickmay (1952) is assigned a tentative age of Carboniferous(?) as shown on fig. 1. Preliminary zircon age is 325 m.y. [unpublished data].
Source: GNU records (USGS DDS-6; Reston GNULEX).
- Usage in publication:
-
- Palmetto Granite*
- Modifications:
-
- Age modified
- AAPG geologic province:
-
- Piedmont-Blue Ridge province
Summary:
Age of Palmetto Granite changed to Carboniferous based on preliminary U-Pb dates on zircons and because it lacks metamorphic foliation except near Brevard fault zone.
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 ([ ]).