• Force_majeure123@aussie.zone
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      1 month ago

      Those are thrombolites! Ancient bacterial (?) colonies that are still alive, they turn the air and stuff into calcium deposits

      • TheWitchofThornbury@aussie.zone
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        1 month ago

        Stromatolites? Yeah, relics of the first life on earth. Or are thrombolites different from stromatolites? Never heard of thrombolites.

        • sqgl@beehaw.org
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          1 month ago

          From the rabbit hole…

          Both structures are created by cyanobacteria.

          The name “cyanobacteria” (from Ancient Greek κύανος (kúanos) ‘blue’) refers to their bluish green (cyan) color,[5][6] which forms the basis of cyanobacteria’s informal common name, blue-green algae.[7][8][9][note 2]

          Common blue-green algae has magic properties!