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.