Rheic Ocean, a Paleozoic ocean between the large continent Gondwana to the south and the microcontinents Avalonia and others
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Further afield at the time of the event, on the continental shelf on the other side of the Rheic Ocean, it has been recognised in Morocco, Cantabria in northern Spain, the Carnic Alps and Graz Paleozoic in Italy and Austria, the Montagne Noire in France and in the Barrandian area of the Czech Republic.