Precambrian Atmosphere

Arthur V. Chadwick (chadwicka@swac.edu)
Sat, 18 Jan 1997 19:19:15 -0800

December issue of Geology p. 1135, an article by H. Ohmoto titled
"Evidence in pre-2.2 Ga paleosols for the early evolution of
atmospheric oxygen and terrestrial biota":
"Minimum(his italics) concentration of O2 in the 3.0-2.2Ga
atmosphere is calculated to be about 1.5% of the present
atmospheric level"

Kinda the final blow to those who still think the early earth had a reducing
atmosphere....
Art
http://chadwicka.swau.edu