Although a very prominent feature as one ascends the Robson Glacier, Extinguisher Tower is not a peak but simply the end of a sharp ridge. Five years after Arthur Coleman named the landmark, geologist Dr. Charles D. Walcott wrote that, "It so happens that that particular rock carries a very important bed of Cambro-Ordivician fossils and will be referred to many times in the future in literature. It may be that I shall suggest a shorter and more euphonious name for it." However it seems he didn't and the name Extinguisher Tower remains.