Neoproterozoic carbonate rocks. Dating from 800 million years ago,these rocks contain some of the oldest fossilised stromatolites in Namibia. A stromatolite is a sedimentary structure formed by the trapping and binding of particles by communities of marine micro-organisms,particularly cyanobacteria (blue-green algae). The weathering is a result of Karst topography. This is where rock has layers of variable solubility,allowing for different rates of water erosion. This results in irregular holes,grooves and caves within the rock | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Stammers, Sinclair |
Taille de l’image : | 3742 px × 4668 px |
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Property Release : | Non requis |
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