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Of all modes of fossilization, cellular mineralization, whether by the non-biologic process of permineralization (“petrifaction”) or by microbially mediated mineral precipitation (“authigenic mineralization”), is the most faithful to the preservation of life-like cells and tissues that is known, yielding fossils that are among the biologically and taphonomically most informative available from the...
Fossil evidence of the existence of life during the Archean Eon of Earth history (>2500Ma) is summarized. Data are outlined for 48 Archean deposits reported to contain biogenic stromatolites and for 14 such units that contain a total of 40 morphotypes of described microfossils. Among the oldest of these putatively microfossiliferous units is a brecciated chert of the ∼3465Ma Apex Basalt of Western...
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