1 / 7

MAGMA CHAMBER

Parts of a volcano Also see the Glossary of volcano terminology http://vulcan.wr.usgs.gov/Glossary/volcano_terminology.html. The space where magma collects below a volcano. MAGMA CHAMBER. The channel through which magma rises to the surface. CONDUIT. Vent = the top of the conduit.

bly
Télécharger la présentation

MAGMA CHAMBER

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Parts of a volcanoAlso see the Glossary of volcano terminologyhttp://vulcan.wr.usgs.gov/Glossary/volcano_terminology.html The space where magma collects below a volcano MAGMA CHAMBER The channel through which magma rises to the surface CONDUIT

  2. Vent = the top of the conduit Crater = rim of the vent SUMMIT ERUPTION (Lava and other materials erupting from a vent on top) Can also be FLANK eruption (materials erupting from a vent on the SIDE)

  3. A CALDERA forms • When the magma chamber of a volcano empties out and the volcano collapses (e.g. Crater Lake, Oregon) Or • When a volcano blows its top (e.g. Mount St. Helens)

  4. Major types of volcanoes also see on-line supplemental texthttp://pubs.usgs.gov/gip/volc/ • SHIELD VOLCANOES • Broad, gentle domes, formed from basaltic lava (Example: Hawaii) • Can havelava flows with smooth, glassy rope-like surfaces called PAHOEHOE, or • Lava flows with jagged broken surface called AA • CINDER CONES • Small, symmetrical conical pile of PYROCLASTS (meaning solid chunks of rocks and ash) Example: Sunset crater

  5. COMPOSITE VOLCANOES or STRATOVOLCANOES • Cone shaped, with alternating layers of lava and loose pyroclastics (Example: Mount Shasta, Mount Fuji) • Associated with subduction zones • Distributed around the Pacific ocean (Ring of fire) and Mediterranean sea

More Related