Rịba ama amaokwu a dị n'okpuru ma zaa ajụjụ ahụ mgbe e mesịrị n'otu asụsụ ahụ dị ka amaokwu ahụ:  Ebe ọ na-aga: Osimiri South Nahanni na-amalite na ọdịda anyanwụ nke Ugwu Christie nke Ugwu Mackenzie, na elu 1,600 mita (5,200 ft). Ọ na-aga n'ebe ndịda na Yukon <unk> Northwest Territories ókè maka 10 kilomita (6 mi), mgbe ahụ na-atụgharị n'ebe ndịda ọwụwa anyanwụ n'ime Northwest Territories na Moose Ponds. Ọ na-asọba n'Ugwu Selwyn, ebe ọ na-enweta mmiri nke Osimiri Little Nahanni, n'ebe ndịda nke Sapper Range.  Ajụjụ: Ebee ka Osimiri South Nahanni si malite?
n'akụkụ ọdịda anyanwụ nke Ugwu Christie nke Ugwu Mackenzie