Blackwell Publishing
Precambrian Paleozoic Mesozoic Cainozoic
Cambrian 590 MYRBP Ordovician 438 MYRBP Silurian 438 MYRBP Devonian 408 MYRBP Carboniferous 360 MYRBP Permian 286 MYRBP

At the end of the Permian, nine-tenths of all species became extinct. Why did such a massive extinction take place?

During this period, the continents collided to form one huge continent, called Pangea. The great variety of marine invertebrates inhabited warm coastal waters. Many of these habitats disappeared when the continents joined, and this may have caused many extinctions.

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