A mound or dome-shaped microbial community formed by successive layers of cyanobacteria, which trap sedimentary particles and grow upwards. Fossil stromatolites can be billions of years old, and represent some of the oldest fossils on Earth.
A mound or dome-shaped microbial community formed by successive layers of cyanobacteria, which trap sedimentary particles and grow upwards. Fossil stromatolites can be billions of years old, and represent some of the oldest fossils on Earth.