Stromatolite fossil. Stromatolites are large,stony,cushion-like masses formed from many layers of cyanobacteria (blue-green algae). They have been preserved due to their ability to secrete calcium carbonate. They are among the oldest organic remains that have been found. This specimen is from the Precambrian epoch (4000 to 570 million years ago) and was found in Morocco | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Land, Martin |
Taille de l’image : | 4689 px × 3736 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |