and Volgo-Uralia (covered by younger deposits). Sarmatia and Volgo-Uralia formed a proto-craton (sometimes called "Proto-Baltica") at c. 2.0 Ga which collided with Fennoscandia c. 1.8-1.7 Ga. The sutures between these three blocks were reactivated during the Mesoproterozoic and Neoproterozoic.

Between 750 and 600 million years ago, Baltica and Laurentia rotated clockwise together