Geology of Colorado (Boulder Valley) - Field Trip #1, Stop #4: Lykins Formation

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Lykins formation, Forelle member: Side view of stromatolite showing the thin algal mat laminations. It's believed that the widespread presence of stromatolites contributed to the conversion of carbon dioxide to oxygen in the Earth's atmosphere.
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Lykins formation, Forelle member: Side view of stromatolite showing the thin algal mat laminations. It's believed that the widespread presence of stromatolites contributed to the conversion of carbon dioxide to oxygen in the Earth's atmosphere.