1. Surficial geology, southern Mackenzie River Valley, District of Mackenzie, Northwest Territories [cartographic material] Yale Public content 1993. 2012-07-11T19:47:53Z. 2012-07-19T15:48:17Z. Rutter, Nathaniel W. Geological Survey of Canada. English. Public. Northwest Territories, Mackenzie, and Mackenzie River Valley.