Volcanoes and Calderas
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Volcanoes are both horrendous in their destructive power and fascinating in how they alter landscapes. While there are many types of eruptions, volcanoes themselves fall into two general categories:

  1. shield volcanoes - very tall, but very very wide, dome shaped volcanoes caused by fast-flowing lava;

  2. stratovolcanoes - the classic, conical-shaped volcano formed by alternating layers of ash and lava.

A caldera, on the other hand is a volcano that has eroded and collapsed in on itself, leaving what we often call a ‘crater’.

Studying volcanoes reveals much about what is going on underground in Earth’s crust and mantle.

Soufriere Volcano, Monserrat - R.S.I. Photoshttp://www.rsiphotos.com/gallery_detail.php?PhotoID=127
General Pages
Historical Volcanoes and Eruptions
  1. 2006: Indonesian Mud Volcano:  Wikipedia  |  BBC

  2. Stromboli Volcano, Italy

  3. 2010: Eyjafjallajokull volcanic ash cloud over Europe

  4. BBC News Special Report  |  Graphics  |  Maps

  5. How you would solve a problem like Icland’s Eyjafjallajokull

  6. 2010: Merapi 2010: pyroclastic surges wreck villages in front of the world's press

  7. When a killer cloud hit Britain: 1783 eruption of Laki, Iceland - BBC