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Prior to the appearance of the Ediacara biota, life on Earth is primarily represented in the fossil record by simple, single-celled organisms such as cyanobacteria. The polished rocks at this station are examples of stromatolites. Stromatolites are layered, mounded structures that are formed by colonies of microbial organisms and sediment that becomes trapped within the organic mats created by those organisms Modern equivalents of these ancient stromatolites can be seen today in locations such as Shark Bay in Western Australia, and fossils similar to this one are found throughout the Flinders Ranges.
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