These calcareous structures — the result of what was a brand-new process, using solar radiation as a source of energy — are stromatolites, constructed by complex microbial communities, in particular cyanobacteria.

这些钙质结叠层石，由复杂的群落成，特藻细菌。这一个全新的过程，利用太阳辐射作为能量来源。