volcano
a conical or steep-sided mountain a crater at the top lava flows or ash deposits extending down the sides steam or smoke coming from the crater seismic activity in the area volcanic rocks or melted glass
volcano which is a conical or steep-sided mountain volcano which is a crater at the top volcano which has lava flows or ash deposits extending down the sides volcano which has steam or smoke coming from the crater volcano which has seismic activity in the area volcano which has volcanic rocks or melted glass