Canadian Journal of Earth Science, 43, 1489-1501. Frost, C.D., Frost, B.R., Kirkwood, R., and Chamberlain, K.R. (2006) The tonalite-trondjhemite-granodiorite (TTG) to granodiortie-granite-monzogranite ...
Two additional observations from the Barberton rocks lean toward a more clement climate during the Archean. First, at the proposed temperature of 70°C (Knauth & Lowe 2003), we would expect to see ...
Three types of granitoid rocks are central to this geologic origin story—tonalite, trondhjemite, and granodiorite—which together are known as TTG. Evidence of Archean TTG rock can be found ...