No. Volcanic rocks are made of the same materials that other rocks are.
Yes, Viti Levu is a volcanic island which composed of lava flows and other volcanic materials.
Yes
Thermopylai means 'hot gates'. The area was volcanic.
Volcanic mountains are formed by molded material
Fine ash and dust
vent
vent a+
vent a+
vent a+
vent a+
this is a rock .