Bolivian Stromatolites
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These Bolivian Stromatolites are polished to show of their beautiful patterns of Black and brown layers. The information about these stromatolites has been updated. Most sources had them as 2.5 billion years old. More recent research has the from the Upper Cretaceous Period, Maastrichtian Stage. They come from The South American Country of Bolivia in an area south of Cochabamba. They are found in the Miraflores Formation.