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Biologic And Geologic Systems Wed2500 Million Years AgoModern geological processes begin. Coupling tightens between geologic and biologic systems. Mineral-forming organisms modify the chemical and physical nature of the biosphere. Bacteria induce minerals to precipitate huge carbonate platforms, giant barrier reefs, fringing reefs, and mounds.
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Mat, stromatolite, and reef-building communities are highly varied. These tiny architects build huge and diverse rock-solid parts of the planet. (Photograph by Stjepko Golubic) |
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