It has an explosion crater around 700 m wide, with a surrounding tuff ring.

It consists of an explosion crater about 600m wide, partly filled with water.

Gradually, an ash cone was built up over the explosion crater.

The explosion crater (tephra ring) Lúdent dates from this cycle.

It has a 600 m wide explosion crater, with a surrounding tuff ring.

A low tuff cone with an explosion crater about 150m wide, it is now covered by industrial development.

But Doc was coming to some startling conclusions, as he glanced along the fourth side of the explosion crater.

An explosion crater around 200 m wide with a surrounding tuff ring.

The scoria cone sat in the middle of its large explosion crater with surrounding tuff ring.

There are three explosion craters at the summit.