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Name:
Pilbaria perplexa
Age: Precambrian
Formation: Duck Creek Dolomite, Wyloo Group
Location: Ashburton Basin, Paraburdoo, Australia
Size: Stromatolite is 5.8 inches across
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This is a very interesting stromatolite specimen from the Precambrian of Australia. Authorities believe that stromatolites were formed by masses of green or blue-green algae, or ''cyanobacteria''. Pilbaria perplexa is believed to have grown in a shallow marine lagoon environment with rare periods of emergence. It is also believed that this stromatolite is 2 billion years old! This striking mass has been highly polished on one side for optimal display. The unique pattern of the stromatolite is beautifully showcased, and the different shades of the mineral replacement are quite striking. This is a fabulous example of this very uncommon stromatolite from Down Under.
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