Lake Thetis is a saline coastal lake in the mid-western region of Western Australia. The lake is situated east of the small town Cervantes, 2 kilometres (1.2 mi) inland from the Indian Ocean, on a Quaternary limestone pavement.© Wikipedia
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Lake Thetis is located close to Cervantes in Western Australia and is one of the few locations in the world where you can view living marine stromatolites. We had been to look at these ancient formations at Hamlin Pool in Shark Bay and were keen to see how they had formed at Lake Thetis.
Lake Thetis can be accessed by driving along Hansen Bay Road. A boardwalk leads from the carpark to the lake and viewing areas for a closer look at the structures created by these ancient organisms. They are very delicate and can be easily damaged so you are asked to stay on the designated tracks. It is estimated that Lake Thetis became isolated from the sea thousands of years ago and the salinity of the water has increased allowing the stromatolites to survive. There are interactive signs along the boardwalk with information about this phenomena.
The stromatolites are one of the earliest forms of life to evolve on earth. Samples from these living organisms indicate similarities with fossils from up to 3 billion years ago and are one of the few living organisms to produce oxygen - fascinating stuff.