The continents Laurentia and Baltica collided between 450 and 400 Ma, during the Caledonian Orogeny, to form Laurussia (also known as Euramerica).
Banua Laurentia miwah Baltica matabrakan sawetara 450 miwah 400 Ma, salami Orogeni Kaledonia, antuk ngwangun Laurussia (sané  ketah kawastanin Euramerica).