Captain Scott at the South Pole Fry's Cocoa & Chocolate Volcanic eruption on Mount Erebus Ross Island, so called after Captain Sir James Ross, is composed of four mountains, one of which is still an active Volcano. This is the biggest and is called Mount Erebus. It is continually smoking and frequently small eruptions take place, when great volumes of smoke and felspars pour out of the crater, no lava flow has ever been seen, though the land round C Evans is composed of old lava.