Paleozoic Era: DevonianBack
In the course of the Devonian (from 416 to 360 million years ago) the largest Palaeozoic tropical reef in Europe appeared, developed and disappeared. Its remains have a thickness of more than a kilometre, a width of at least 5 and a length of almost a hundred.
During the Devonian, the formation of rocks is intertwined with the life of the organisms that contribute to their formation, with the accumulation of their own shells and scaffolding.
Evidence for this enormous coral reef has remained, and can be found today in the Coglians massif.