Mt St Helens during the eruption

A variety of sources were used for the construction of this webpage;

  • USGS - 10/10; a reliable governmental website


  • BBC Bitesize - 9/10; a reliable, large, specialised education website


  • National Geographic - 8/10; a TV and magazine website specialising in geography and wildlife


  • Seatle Pi Newspaper - 5/10; a newspaper website, possibly not as well researched or slightly biased to a political perspective


  • Washington State Department of Natural Resources - 10/10; a reliable governmental website, with up to date statistics


  • Abblanch Geography - 5/10; a more personal website created by a geography teacher


  • The World, David Waugh, 1987 - 7/10; a reliable, researched textbook, but slightly outdated and largely based on secondary evidence

Mt St Helens during the eruption

Glossary

  • Pyroclastic flow - a superheated stream of ash, lava and debris travelling at high speed

  • Lahar - a combination of a pyroclatic flow with the addition of mud and water; slower and less hot

  • Composite volcano - a volcano layered of ash and magma

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