Sawin, Robert S.; Franseen, Evan K.; Ludvigson, Greg A.; Watney, W. Lynn; West, Ronald R.
(2014-05-27)
The informal stratigraphic term “Precambrian” is replaced by formal nomenclature—Proterozoic and Archean Eonothems/Eons—and the informal term Hadean. The Phanerozoic Eonothem/Eon, representing all rocks younger than the ...