Laurussia

Laurussia was a supercontinent formed in the Middle Palaeozoic by the collision of two Cambrian continents Laurentia (Mostly the present North America) and Baltica (Present Western Eurasia). Laurussia was relatively short lived. It collided with the Southern Supercontinent Gondwana in the Permian to form a single continent Pangea comprising most of the Earth's continental crust.