hegpeg commented on the list geologic-timescale--era
Paleozoic, Mesozoic, and Cenozoic are all under the Eon of 'Phanerozoic' meaning 'abundance of fossil evidence of life, especially higher forms'.
January 31, 2011
hegpeg commented on the list geologic-timescale--eon
Hadean, Archaen, and Proterozoic are also known together as 'Precambrian' or 'before life'.
Comments by hegpeg
hegpeg commented on the list geologic-timescale--era
Paleozoic, Mesozoic, and Cenozoic are all under the Eon of 'Phanerozoic' meaning 'abundance of fossil evidence of life, especially higher forms'.
January 31, 2011
hegpeg commented on the list geologic-timescale--eon
Hadean, Archaen, and Proterozoic are also known together as 'Precambrian' or 'before life'.
January 31, 2011