- Usage in publication:
-
- Roxboro Metagranite
- Modifications:
-
- Named
- Dominant lithology:
-
- Granite
- Granodiorite
- AAPG geologic province:
-
- Piedmont-Blue Ridge province
Summary:
Roxboro Metagranite named in Person Co., north-central NC. Unit consists of a granite, alkali-feldspar granite, and granodiorite facies with phenocrysts of plagioclase, quartz, and perthite. Unit is light- to medium-gray and generally microphaneritic. Intrudes late Precambrian and Early Cambrian(?) volcanic and epiclastic rocks. Age of the Roxboro ranges from late Precambrian to Early Cambrian. Date on zircon of 575+/-20 m.y. determined by Glover and Sinha (1973), who referred to the Roxboro of this report as an unnamed granodiorite. Unit was subjected to regional metamorphism approximately 200 yrs after emplacement.
Source: GNU records (USGS DDS-6; Reston GNULEX).
- Usage in publication:
-
- Roxboro Metagranite*
- Modifications:
-
- Overview
- Dominant lithology:
-
- Granite
- AAPG geologic province:
-
- Piedmont-Blue Ridge province
Summary:
Roxboro Metagranite used in accordance with Briggs and others (1978). Age is based on radiometric date of 575+/-20 Ma by Glover and Sinha (1973) (who use the name informally).
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 ([ ]).