
1) Cinder cone 2) Volcano of Iceland
Found on
https://www.crosswordclues.com/clue/hverfjall

Hverfjall (also known as Hverfell) is a tephra cone or tuff ring volcano in northern Iceland, to the east of Mývatn. It erupted in 2500 BP in the southern part of the Krafla fissure swarm. The crater is approximately 1 km in diameter. Tephra has been carried from Hverfjall all over the Lake Myvatn area. A landslide apparently occurred in the sout...
Found on
http://en.wikipedia.org/wiki/Hverfjall
No exact match found.