English: Morne aux Diables volcano at the northern tip of Dominica is a stratovolcano composed of andesitic lava domes, lava flows, and block-and-ash flow deposits well exposed in coastal sea cliffs. Volcanism at the dominantly Pleistocene Morne aux Diables is considered to have likely continued into the Holocene; unconsolidated block-and-ash flow deposits extend to the NW and NE coasts. Fumarolic areas are present on the volcano, and the Penville Cold Soufrière, an area of bubbling pools, lies within the youngest crater of the volcano.