American geologist William E. Davies called the long mountain system to the north of J.P. Koch Fjord and Frederick E. Hyde Fjord the "Nansen-Jensen Alps", with the westernmost foothills in neighboring Nansen Land, stretching past the De Long Fjord area across Roosevelt Land and the Roosevelt Range, and reaching all the way to Johannes V. Jensen Land in the east.W. E. Davies, Landscape of Northern Greenland 1972
