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Calderas. by: Jen Feigi and Kelly Foster. What is a caldera?. A caldera is a volcanic feature formed by the collapse of a volcano into itself. Calderas may be filled with water, creating crater lakes. Caldera means “cauldron” in Spanish. How do calderas form?.

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calderas

Calderas

by:

Jen Feigi and Kelly Foster

what is a caldera
What is a caldera?
  • A caldera is a volcanic feature formed by the collapse of a volcano into itself.
  • Calderas may be filled with water, creating crater lakes.
  • Caldera means “cauldron” in Spanish.
how do calderas form
How do calderas form?
  • A collapse is caused by the emptying of the magma chamber.
  • If enough magma is erupted, the emptied chamber will not be able to support itself.
  • The circular depression is the result.
explosive calderas
Explosive Calderas
  • Magma rises to the surface of the volcano.
  • Gas quickly expands causing explosion and spreading volcanic ash.
  • Lava may also be erupted.
yellowstone caldera
Yellowstone Caldera
  • Started erupting 1.9 millions years ago.
  • Ejected 2500 cubic kilometers of pyroclastic material.
  • This eruption was 2500 times bigger than the Mount Saint Helen eruption.
non explosive calderas
Non-explosive Calderas
  • The magma is less vicious.
  • These calderas are also known as subsidence calderas.
  • The magma chamber flows instead of exploding.
kilauea caldera
Kilauea Caldera
  • An active volcano in the Hawaiian Islands.
  • Kilauea means “spewing” or “much spreading”.
  • It is the most active and most visited volcano on the planet.
non volcanic calderas
Non-volcanic Calderas
  • These calderas are very rare.
  • They are caused by erosion rather than eruption.
la palma caldera
La Palma Caldera
  • Located in the Canary Islands.
  • Most active volcano in the Canary Islands.
  • Largest erosion crater in the world.
reference page
Reference Page
  • http://en.wikipedia.org/wiki/Caldera
  • Thompson, Graham R., Turk, Jonathan. Earth Science and the Environment. 3rd ed. Thompson: Australia 2005.