The presence of liquid water is evidenced by certain highly deformed gneisses produced by metamorphism of sedimentary protoliths. The moderate temperatures...
40 KB (4,104 words) - 19:36, 7 August 2024
metamorphosed, faulted, foliated, and folded. Even older rocks, such as the Acasta gneiss of the Slave craton in northwestern Canada, the oldest known rock in...
87 KB (9,655 words) - 06:54, 21 August 2024