guide on Archean
the duration of Precambrian, and Archean (also in term of 24 hours) Why is the
only possibility for timing is the absolute age?
pregeologic history means? Know the different kind of meteorites, how the
asteroid zone formed, and when? How old is the oldest crustal rock?
did the differentiation of the earth happen?
could be the composition of the earliest crust? Understand how granitic crust
evolved by partial melting?
are the meaning of the following terms: Shield, platform, craton. Be able to
explain each of them. (Best way, to practice with girl/boyfriend around
midnight, to keep your partner excited). The area of Canadian shield.
Typical Archean rocks: Greenstone, gneiss. You must know which is which, how did
they form, what is their composition?
Kenoran orogenesis. What is the importance of this orogen? How about the plate
tectonics in the Archean?
Evoluion of atmosphere! Know the formation, does the earth have its original
atmosphere? Why or why not? How the atmosphere formed, what was its composition,
how is it different or similar to the present day one?