Large peninsula, northeastern Canada. Divided between the provinces of Quebec and Newfoundland and Labrador, it occupies an area of about 625,000 sq mi (1,620,000 sq km). Its highest mountains are over 5,000 ft (1,520 m), and its coast is lined with islands. It forms the easternmost portion of the plateau known as the Canadian Shield. Politically, Labrador refers to the Newfoundland and Labrador portion of the peninsula; the Quebec portion is Ungava Peninsula. Political control of the region was disputed by the two provinces until the Quebec-Newfoundland border was established in 1927.