Volcano

Volcanos occur along plate boundaries or at hotspots (erratic). They are usually on islands, narrow land (peninsula or isthmus), rift valleys, oceanic ridges. Lava/magma flows on the surface or in lava tubes. When near the surface they are under 2 m in diameter. Lava tubes can be much larger further down, but the lava flows in bankless rivers.
Lava lakes only persist in the calderas of volcanoes on rift valleys or islands.
==See Also==
'volcano' on Twitter
Erta Ale images
==Sources==
https://en.wikipedia.org/wiki/Volcano
http://www.telegraph.co.uk/travel/maps-and-graphics/mapped-the-worlds-most-dangerous-volcanoes/?WT.mc_id=tmg_share_tw
https://en.wikipedia.org/wiki/Lava_lake
Category:Geology
Category:Geography
Category:Fire