Photos I took of the Stromatolites, Lake Thetis.
"Stromatolites provide some of the most ancient records of life on Earth by fossil remains which date from more than 3.5 billion years ago."
"The rock-like platforms and domes in front of you are both stromatolites but they are built by different types of cyanobacteria, hence their different shapes. As the cynobacteria grow upwards, their activities bind calcium carbonate onto the growing surface. Lake conditions are 1.5 times saltier than the ocean, supporting very few predators thus allowing the microbial communities to survive thousands of years. Dark areas on the platforms and domes indicate wet, active growth of cyanobacteria, which continue constructing the stromatolites."