images above are from
Webshots.com and Flickr
See also:
Hot Springs
Seismology
Caving
A volcano is an opening (or rupture) in the Earth's surface or crust, which allows hot, molten rock, ash and gases to escape from deep below the surface. Volcanic activity involving the extrusion of rock tends to form mountains or features like mountains over a period of time.
Volcanoes are generally found where tectonic plates pull apart or are coming together. A mid-oceanic ridge, like the Mid-Atlantic Ridge, has examples of volcanoes caused by "divergent tectonic plates" pulling apart; the Pacific Ring of Fire has examples of volcanoes caused by "convergent tectonic plates" coming together. By contrast, volcanoes are usually not created where two tectonic plates slide past one another. Volcanoes can also form where there is stretching of the Earth's crust and where the crust grows thin (called "non-hotspot intraplate volcanism"), such as in the African Rift Valley, the European Rhine Graben with its Eifel volcanoes, the Wells Gray-Clearwater Volcanic Field and the Rio Grande Rift in North America.
Finally, volcanoes can be caused by "mantle plumes", so-called "hotspots"; these hotspots can occur far from plate boundaries, such as the Hawaiian Islands
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A volcanic fissure and lava channel.
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- Active Volcanos of the World (using the Google Maps API)
- Volcanoes photo galleries on Google
- Acamarachi Volcano, Chile - Wikipedia
- Acotango Volcano, Bolivia/Chile - Wikipedia
- Aguas Calientes, Chile - Wikipedia
- Antofalla Volcano, Argentina - Wikipedia
- Antuco Volcano, Chile - Wikipedia
- Aracar Volcano, Argentina - Wikipedia, the free encyclopedia
- Big Ben (Heard Island) - Wikipedia
- Capulin Volcano National Monument
- Cerro Arenales, Chile - Wikipedia
- Cerro Lipez, Bolivia - Wikipedia
- Copahue Volcano, Argentina - Wikipedia
- Emi Koussi, Chad - Wikipedia
- Eve Cone, (British Columbia), Canada - Wikipedia
- Fogo, Cape Verde - Wikipedia
- Hawaii Volcanoes National Park@ fix
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- Kilauea Volcano - Hawaii@ fix
- Krakatau - Indonesia@ fix
- Lanin Volcano - Wikipedia, the free encyclopedia
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- Llullaillaco Volcano, Argentina - Wikipedia
- Maipo Volcano - Wikipedia, the free encyclopedia
- Mayon - Philippines@ fix
- Mount Aragats, Armenia - Wikipedia
- Mount Bromo - Indonesia
- Mount Cameroon, Cameroon - Wikipedia *
- Mount Etna - Italy@
- Mount Meager, Canada - Wikipedia
- Mount Pinatubo - Philippines@
- Mount Price, (British Columbia), Canada - Wikipedia
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- Ojos del Salado Volcano, Argentina - Wikipedia
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- Popocatepetl - Mexico@
- Ruby Mountain, (British Columbia), Canada - Wikipedia
- Socompa Volcano, Argentina - Wikipedia
- Tibesti Volcanic Region - Chad
- Tipas Volcano, Argentina - Wikipedia
- Toussidé, Chad - Wikipedia
- Uturuncu volcano, Bolivia - Wikipedia
- Volcanoes of Canada
- Volcanoes of the United States
- Worldwide Volcanic Reference Map
New:
- Chile's Chaiten Volcano One Of Scores Of Active Volcanoes In Region
- Chile volcano fires ash 20 miles high
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