Some speculated causes of it include the reduction
Some speculated causes of it include the reduction of oceanic continental shelves due to the formation of the super-continent Pangaea and volcanic eruptions in Siberia, creating large ash clouds that covered the Earth. Because of the loss of biodiversity from this event, the recovery process took significantly longer than similar events during the Ordovician and Devonian periods. For 10 points, name this event that occurred at the end of the Paleozoic era, ushering in the age of the dinosaurs.
Some speculated causes of it include the reduction of oceanic continental shelves due to the formation of the super-continent Pangaea and volcanic eruptions in Siberia, creating large ash clouds that covered the Earth.
{Permian} mass {extinction} [prompt on extinction; accept the {Great Dying}]