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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...
Palynological techniques have only rarely been applied to Archean rocks, mainly because of concerns about contamination. However, where microstructures are abundant and well documented, palynology can add considerably to interpretations based on thin-section examination. A modified palynological preparation method, which avoids vigorous physical or chemical methods that might cause the fragmentation...
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