 Subsequently, Mount Fee was one of the volcanoes in the Mount Cayley volcanic field illustrated by volcanologist Jack Souther in 1980.Others included the Mount Cayley massif, Cauldron Dome, Slag Hill, Ember Ridge and Ring Mountain, which was titled "Crucible Dome" at the time.Souther created a geologic map the following year that displayed the locations of the volcanoes and the regional terrain.