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VOLCANOES, Eruptions and Igneous Features

 

 Volcanoes.htm


Redoubt VolcanoVolcanoes Volcanoes.htm

Video

http://video.nationalgeographic.com/video/player/environment/environment-natural-disasters/volcanoes/volcano-eruptions.html

 

           

 

Locations of volcanoes

http://www.dartmouth.edu/~volcano/

http://www.cotf.edu/ete/modules/volcanoes/vlocation.html

Definition

  • a mountain that forms when magma reaches the earth’s surface

Cascade Range from Northern California to Washington

http://vulcan.wr.usgs.gov/Volcanoes/Cascades/ImageMaps/CascadeRange/cascade_range.html

Mt. St. Helens, May 1980

Kilauea in Hawaii

 

http://www.volcanolive.com/


Formation of volcano


Type of eruption


Location and types of volcanoes

http://vulcan.wr.usgs.gov/Glossary/VolcanoTypes/volcano_types.html

http://www.msnucleus.org/membership/html/k-6/pt/volcanoes/6/ptv6_2a.html

 

Most volcanoes occur along plate boundaries or at hot spots in the crust

http://www.worldatlas.com/aatlas/infopage/ringfire.htm

Hot spots – a region where hot rock extends from deep within the mantle to the surface

Shield volcano – flat, wide volcano formed by quiet eruption of low-viscosity lava

http://vulcan.wr.usgs.gov/Glossary/ShieldVolcano/description_shield_volcano.html

Cinder cone volcano-small, steep sided volcano formed by ash and cinders

http://www.windows.ucar.edu/cgi-bin/tour_def/earth/interior/cinder_cone.html

Composite volcano – formed from explosive eruptions, that produce a combination of lava and ash


Other Igneous Features http://www.australianmuseum.net.au/igneous-intrusions

batholith – largest type of intrusive igneous rock mass, often form the core of a mountain range, such as the Sierra Nevada range in California

http://www.encyclopedia.com/topic/batholith.aspx

sill – magma that hardens in rock cracks parallel to existing rock

http://vulcan.wr.usgs.gov/LivingWith/VolcanicPast/Notes/dikes_sills.html

dike – magma that hardens in rock cracks perpendicular to existing rock

volcanic neck – when magma hardens in a volcano’s pipe


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