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.

这些钙是叠层石，由复杂微生物群落成，特别是蓝藻细菌。这是一个全程，利用太阳辐射作为能量来源。