Tumbiana stromatolite placed next to a US penny for scale. This stromatolite was formed approximately 2.7 billion years ago in the Tumbiana Formation, Western Australia. Stromatolites are formed from layered deposits of limestone trapped by blue-green algae. Stromatolites are some of the earliest known lifeforms on the planet. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / JPL-Caltech / NASA |
Taille de l’image : | 6000 px × 4000 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |