What prevents the world from turning into a lake of fire and brimstone? This major geological HotSpot at Yellowstone National Park displays its 'half dome' granite rock cap sealing the world's largest volcano awaiting to erupt when in-time it will. Report: http://conceptactivityresearchvault.wordpress.com/2011/05/25/earth-event-alerts/
Underwater volcanoes are located all around the world, usually at tectonic plate boundaries. They can be deep down in the depths of the ocean, or very shallow. This erupting underwater volcano, for instance, is very shallow, and even the vent is visible from the surface of the ocean. -- Vetta A.
East of Reykjavik, Iceland lies the mountain, Hengill. Hengill was formed from a Palagomite tuff, it is a central volcano and has a giant magma chamber beneath it. When thick basalt lava flows cool, they form hexagonal cracks, called columnar joints. These can be found also in Ireland & Scotland.
The most famous and dangerous active volcanoes in the world
The Big Island of Hawaii is not just about snorkelling, colourful sand beaches and flowing waterfalls. It's also home to the most active volcano in the world, Kīlauea. Which means a visit to the Hawaii Volcanoes National Park is a must while on the island. Here is a list of what you should not miss while exploring the park.