Reply to “Paleo- to Mesoarchean polymetamorphism in the Barberton granite-greenstone belt, South Africa: Constraints from U-Pb monazite and Lu-Hf garnet geochronology on the tectonic processes that shaped the belt: Discussion” by M. Brown
Were modern-type subduction-accretion–like processes already operative in the Archean, or did a hotter Archean Earth with consequently weaker lithosphere prevent this and favor gravitationally driven vertical tectonics? Brown’s comment on [Cutts et al. (2014)][1] weighs in on this central