Stromatolite, item 380

Stromatolite, item 380


Madiganites mawsoni.  Middle Cambrian (520 million years old).  Stromatolites are thought to be responsible for the initial burst of oxygen responsible for the evolution of all animal life on the planet. 

6" X 7" X 1/8" thick.  Stand is included.

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The older part of the "colony" is at the top, older portions having been subsumed.  Living stromatolites can still be found in some coastal locations such as the southwest of Australia.  After fossilization, this specimen acquired a "crown" of durzy quartz.