Layered rock structures formed by microbial mats trapping and binding sediment particles. The fossil record of stromatolites extends back to 3.5 billion years ago, and represents some of the very oldest records of life on Earth.
Layered rock structures formed by microbial mats trapping and binding sediment particles. The fossil record of stromatolites extends back to 3.5 billion years ago, and represents some of the very oldest records of life on Earth.