Quebec is bounded on the N by Hudson Strait and Ungava Bay, on the E by the Labrador area of Newfoundland and Labrador and the Gulf of St. Lawrence, on the S by New Brunswick and the United States, and on the W by Ontario, James Bay, and Hudson Bay. Quebec is Canada's largest province; it is three times the size of France and seven times the size of Great Britain. The Canadian (or Laurentian) Shield underlies the northern nine tenths of the province, which is relatively unexplored and uninhabited; the region has been planed by glacial action into a pattern of rounded hills (including the Laurentian Mts.), swiftly flowing rivers, and numerous lakes and bogs. Dense forests cover much of the land, and the region is rich in minerals.