Mackenzie River great depths to bedrock. A characteristic feature of the delta is its numerous pingos, or hills of earth-covered-ice – some 1,400 of them. The Peel River, carrying much of the runoff from the northern Yukon, joins in the delta at a point northeast of Fort McPherson. Below there, the Mackenzie diverges into several large channels with the largest heading north-northeast, emptying into the Beaufort Sea west of Tuktoyaktuk. At , the Mackenzie River drainage basin encompasses nearly 20 percent of Canada. About , or 54 percent of the basin, lies above Great Slave Lake. Permafrost underlies about three-quarters of the
Black Lake (Fond du Lac River, Saskatchewan) lake include walleye, yellow perch, northern pike, lake trout, Arctic grayling, lake whitefish, cisco, white sucker, longnose sucker and burbot. Black Lake (Fond du Lac River, Saskatchewan) Black Lake is a lake in the Mackenzie River drainage basin in northern Saskatchewan, Canada. It is about long, wide, has an area of , and lies at an elevation of . The primary inflows are the Chipman River, Cree River, Fond du Lac River, and Souter River; the primary outflow is Fond du Lac River, which flows via the Mackenzie River into the Arctic Ocean. The community of Black Lake is located