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Tidal flat of a Precambrian landscape. The Precambrian Eon lasted 4 billion years and spanned the first three-quarters of Earth's history. Stromatolites (mound-shaped structures formed by blue-green algae and cyanobacteria) were dominant life forms during this period and are the first-known life preserved as fossils.
June 6th, 2014
Viewed 4 Times - Last Visitor from Paddington, 02 - Australia on 11/11/2014 at 7:46 AM
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