The Corbin meta-granite , among Georgia's oldest rocks, may have formed during closure of an "Atlantic" ancestor ocean more than a billion years ago, like Pennsylvanian granites formed during closure of Iapetus.
(The Corbin meta-granite; may have formed; T:during closure of an "Atlantic" ancestor ocean; T:more than a billion years ago; L:among Georgia's oldest rocks) (Pennsylvanian granites; formed; T:during closure of Iapetus)
The Corbin meta-granite Pennsylvanian granites
may have formed formed
T:during closure of an "Atlantic" ancestor ocean T:more than a billion years ago L:among Georgia's oldest rocks
T:during closure of Iapetus