Showing posts with label stromatolites. Show all posts
Showing posts with label stromatolites. Show all posts

Friday, January 6, 2012

The Most Ancient Records of Life on Earth

Photo by Mark I Geo
On Shark Bay, Western Australia, a great shot of stromatolites,layered accretionary structures formed in shallow water by cementation of sedimentary grains by biofilm of microorganisms, they provide the most ancient records of life on earth.