1) Crater lake 2) Volcano of Tonga
Found on
https://www.crosswordclues.com/clue/tofua
Tofua Caldera, in Tonga, is the summit caldera of a steep-sided composite cone that forms Tofua Island. Tofua Island is in Tonga`s Ha`apai island group. Pre-caldera activity is recorded by a sequence of pyroclastic deposits and lavas constituting the older cone, followed on the northern part of the island by froth lavas or welded and unwelded ig.....
Found on
http://en.wikipedia.org/wiki/Tofua
No exact match found.
