Monday, February 16, 2009

What are the diffrent types of volcanic landforms, and how are they created?

The three different types of volcanic landforms are shield volcanoes are composite volcanoes and cinder cone volcanoes.

shield volcanoes-Has a gentle upper slope and a stepper lower slope. composed almost entirely of relatively thin lava flows built up over a central vent.Very little pyroclastic material is found within a shield volcano, except near the eruptive vents, where small amounts of pyroclastic material accumulate as a result of fire fountaining events.

composite volcanoes-Have steeper slopes than shield volcanoes.The steep slope near the summit is due partly to thick, short viscous lava flows that do not travel far down slope from the vent.

cinder cone volcanoes-cinder cones are small volume cones consisting predominantly of tephra that result from strombolian eruptions.Cinder cones often occur in groups, where tens to hundreds of cones are found in one area.

No comments:

Post a Comment