Sediments from Mackenzie River, Canada – August 19th, 201069.0N 135.9W
The Mackenzie River spills a load of dense brown sediments into the Beaufort Sea, part of the Arctic Ocean. Its mean discharge is 10,700 cubic metres per second (380,000 cu ft/s). The Mackenzie and its tributaries drain 1,805,200 square kilometres (697,000 sq mi).
The river originates in the Great Slave Lake, in Canada’s Northwest Territories, and flows north. It is the longest river in Canada at 1,738 kilometres (1,080 mi) and, together with its headstreams the Peace and the Finlay, the second longest river in North America at 4,241 kilometres (2,635 mi) in length.