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Normally a volcano is formed when a column of molten rock, known as magma, rises from deep within the Earth, erupts on the surface, and hardens in layers forming the familiar cone shaped mountain we typically associate with volcanoes.
Supervolcanoes are different. These begin when large reservoirs of magma collect deep in the Earth's crust. Magma continues to collect as the reservoir grows to an enourmous size under extreme pressure.A super eruption occurs when the pressurized magma raises overlying crust enough to create vertical fractures that extend to the planet's surface. One by one, magma begins to surge vertically along these new cracks, which forms a ring of erupting vents. Eventually, as the vents merge with each other, the large cylinder of land within the ring has nothing to support it. The remaining earth above the chamber crashes down into the magma below. This collapsing crust forces additional lava and gasses out around the edges of the ring further increasing the violence of the eruption that is now hundreds of times larger than a regular eruption. When the eruption ends it will leave behind a caldera, or large crater, just like the one that forms Yosemite National Park.
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What actors and actresses appeared in Science of Supervolcanoes - 2005?
The cast of Science of Supervolcanoes - 2005 includes: Tom Brokaw as himself
When was Yellowstone supervolcano formed?
The Yellostone volcano as it currently is formed about 2.1 million years ago. The hot spot that produced it has produced a chain of supervolcanoes, all of which are extinct apart from the current one in Yellowstone. This hot spot appears sto have started forming such volcanoes about 15 million years ago.
Where are the most destructive volcaanoes?
Supervolcanoes. There is one under Yellowstone National Park [See related link]
Will there be a supervolcano in 2012?
No. No supervolcanoes are expected to erupt any time in our lifetimes. However, ordinary volcanoes erupt every year.
Where do the deadliest volcanoes mostly occur?
The deadliest volcanoes are the so-called "supervolcanoes", which can cover an entire continent in volcanic ashes. They erupt perhaps once every 100,000 years on average. They are all over the world; for example, there is one in Yellowstone Park. For a list of additional known supervolcanoes, read the Wikipedia article on "Supervolcano". Or some other online source.
What are super volcaneos?
Supervolcanoes are large volcanic systems capable of producing extremely explosive eruptions with the potential to have global consequences. They are characterized by the presence of a magma chamber beneath the Earth's crust, which can lead to massive caldera formations when eruptions occur. Examples include Yellowstone in the United States and Toba in Indonesia. The eruptions of supervolcanoes can release vast amounts of ash and gases, significantly affecting climate and ecosystems.
Was there a super volcano in the lake district?
The answer is, yes, there was. About 40 supervolcanoes are dotted across the globe. There are two in Britain - one in Glencoe, Scotland, the other in Scafell in the Lake District. However, most supervolcanoes, including those in Britain, burned out long ago.http://www.bbc.co.uk/sn/tvradio/programmes/supervolcano/article.shtml
What are supervolcanies?
Supervolcanoes are extremely powerful volcanic eruptions, capable of covering an entire continent in ashes, and significantly changing the world climate for years. These events are believed to have occured several times in the past.
Is it possible to harness a supervolcanoes power?
Their unpredictability in a number of areas makes it impossible at this time to harness the actual power of eruption, although geothermal can be harnessed by tapping into the heat and steam that are created in associated structures.
Are there any supervolcanoes on mars?
At present there is no observed volcanic activity of Mars. The super volcano of Olympus Mon on Mars is thought to be inactive, dating its past eruption from several to 15+ million years ago.
What are the largest volcanic structures on earth?
The largest volcanic structures on Earth are known as supervolcanoes. These massive calderas have erupted with magnitudes many times greater than regular volcanic eruptions. Examples include Yellowstone Caldera in the United States, Taupo Volcanic Zone in New Zealand, and Toba Caldera in Indonesia.
Why do supervolcanoes occur?
super volcanoes can occur when the magma rises into the crust from a hotspot but is unable to breakthrough the crust. Pressure builds in a large and growing magma pool until the crust is unable to contain the pressure.
