Stromatolite #382

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Stromatolite #382
approx. size 3.5cm Lx 2cm W x 2.5cm H

Stromatolites or stromatoliths are layered mounds, columns, and sheet-like sedimentary rocks that were originally formed by the growth of layer upon layer of cyanobacteria, a single-celled photosynthesizing microbe. Fossilized stromatolites provide records of ancient life on Earth.