title: Evidence in pre-2.2 Ga paleosols for the early evolution of atmospheric oxygen and terrestrial biota:  comment and reply
abstract: The major points of disagreement between Holland and Rye and Ohmoto concern (1) the behavior of ferric iron. (2) the mechanisms of Fe loss. (3) the identification of real paleosols, and (4) the ages of some paleosols.
authors.affiliation: Faculty of Science, Tohoku University, Sendai, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Ohmoto
mesh_terms: D001272:Atmosphere / Q000737:chemistry*; D019419:Evolution, Planetary; D005290:Ferric Compounds / Q000032:analysis*; D019015:Geologic Sediments / Q000032:analysis* / Q000737:chemistry; D055593:Geological Phenomena; D005844:Geology; D007501:Iron / Q000737:chemistry*; D010100:Oxygen / Q000032:analysis*; D010163:Paleontology; D012987:Soil / Q000032:analysis*; D013019:South Africa; D014025:Titanium / Q000737:chemistry
chemical_list: D005290:Ferric Compounds; D012987:Soil; D014025:Titanium; D007501:Iron; D010100:Oxygen