Michael & Patricia Fogden / Wave rock, 15 meters high and 110 meters long curved granite cliff face stained with dissolved carbonates and iron hydroxide, approximately 2700 million years old, Western Australia
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Michael & Patricia Fogden / Stromatolites in Lake Thetis, Nambung National Park, Western Australia
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Michael & Patricia Fogden / Stromatolites in Lake Thetis, Nambung National Park, Western Australia
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Hiroya Minakuchi / Stromatolites at low tide, colonies of blue-green algae, the oldest life form that still exists today. Fossils dated to over three billion years ago, Shark Bay, Western Australia, Australia