<P> The third major and final phase of the break - up of Pangaea occurred in the early Cenozoic ( Paleocene to Oligocene ) . Laurasia split when North America / Greenland ( also called Laurentia ) broke free from Eurasia , opening the Norwegian Sea about 60 -- 55 Ma . The Atlantic and Indian Oceans continued to expand , closing the Tethys Ocean . </P>
what were the names of the two smaller supercontinents that formed when pangaea broke apart
Laurasia Eurasia