Figures

Figure 8.8   Prokaryote fossils from the Gunfl int Chert of Ontario, Canada (c. 1.9 Ga): (a) Eosphaera, (b) Kakabekia, and (c) Gunflintia. Specimens are 0.510 m in diameter. (Redrawn from photographs in Barghoorn & Taylor 1965.)

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