Unformatted text preview: ~ 570 Ma Proterozoic _______________________________________________ ~ 2.5 Ga Archean _______________________________________________ ~ 3.8 ? Ga Pre-Archean _______________________________________________ 4.5 Ga Please Note: There is some disagreement as the placement of the Quaternary – Tertiary boundary. Some propose to move it back to the first appearance of widespread glaciation, which occur at about 2.5 Ma...
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This note was uploaded on 12/28/2009 for the course 460 101 taught by Professor Swisher during the Fall '09 term at Rutgers.
- Fall '09