Definition of ttg
An abbreviation for Tonalite, Trondhjemite, and Granodiorite. Found in granitic complexes and batholiths and compose most of the preserved Archean crust on Earth. They contain large infolded remnants of supercrustal rocks as well as numerous inclusions of surrounding greenstone belts.
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Locality Updated: Salt Mountain, Cardona, Bages, Barcelona, Catalonia, SpainFrom Gascon Cuello Fernando, 18th Dec 2014 19:20:50