Approximate location of the Valley (Red Arrow in the northwest quadrant of the map)
About[]
The conspicuous trough that separates the Northwest Peninsula from the Massif du Nord is here called the Trois Rivières Valley. This trough trends about N. 15° W. along an almost straight line from a locality between Gonaïves and Les Poteaux northward to the mouth of Les Trois Rivières near Port-de-Paix. Les Trois Rivières flows only in the northern part of the trough northward from Gros-Morne, but the trough is prolonged southward from Gros-Morne along the low divide between Les Trois Rivières and Rivière la Quinte and along the valley of Rivière la Quinte to the locality where it enters the Gonaives Plain. This trough is apparently limited by faults on parts of both the east and the west side.
The valley of Riviere la Quinte has little relief. Along the road from Gonaives to Gros-Morne the divide between Riviere Is Quinte and Les Trois Rivieres has an altitude of 270 meters above sea level. The flood plain of Les Trois Rivieres northward from Gros-Morne is narrow, and the river swings in great loops against high bluffs. The lowland on both sides of the flood plain is strongly dissected and contains low, rounded hills and higher, narrower strike ridges. A conspicuous strike ridge on the east side of the valley, about 20 kilometers (12 miles) north of Gros-Morne, reaches an altitude of 560 meters (1,640 ft.) above sea level. These hills and ridges are dwarfed by the lofty mountains behind them, in the western part of the Massif du Nord. North of Gros-Morne the mountains west of the valley are not so high.