Stromatolite
etegration | 19 Feb ’21 | 5:48 pm
Stromatolites are layered accretionary structures formed in shallow water by the trapping, binding and cementation of sedimentary grains by biofilms of microorganisms, especially cyanobacteria (commonly known as blue-green algae). They include some of the most ancient records of life on Earth.
Originally posted on 3 Jan ’10 @ 3:03 am
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