Volcano

A volcano was a mountain from which lava flowed out. It also produced large quantities of black smoke that could block out the sunlight. Volcanoes that erupted regularly were called active, while those temporarily devoid of external activity were referred to as dormant. The region of Arad-qur on Exorterra was covered in active volcanoes, while those of Farflung were dormant for the most part. Sometimes, the lava of a volcano would cool rapidly, forming black volcanic glass or black sand.