At about 800, a large volcanic eruption in Mount Churchill near the Alaska border blanketed the southern Yukon with ash. That layer of ash can still be seen along the Klondike Highway. Yukon First Nations stories speak of all the animals and fish dying as a result. Similar stories are told among the Athabaskan-speaking Navajo and Apache, leading to the conclusion by some anthropologists that the migration of Athabaskan peoples into what is now the southwestern United States could have been due to the eruption. After that, the hunting technology saw the replacement of atlatls with bows and arrows.