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Ordovician Period – limestone and liverwort

By | 2017-12-07T09:03:15+00:00 June 24th, 2017|Geology|

The Ordovician period saw the evolution of the octopus At the end of the Cambrian period, about 488 million years ago, most of the plants and animals living on Earth died, because of some catastrophe that we don't know much about. This catastrophe marks the beginning of the Ordovician period. Limestone formed Sea [...]