Keywords |
  • Geology


The Ordovician is the second geological period of the Paleozoic era. It extended from 500 million years ago to 443 million years ago. The golden age of conodonts. Appearance of the first semi-terrestrial plants (water-dependent mosses). Appearance of large cephalopod invertebrae such as the nautiloid orthoceras. Taconic orogeny

Ordovician Ordovician

Ordovician - 1 Photo


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