• Share
  • Email
  • Embed
  • Like
  • Save
  • Private Content
Earth Science - Volcanoes
 

Earth Science - Volcanoes

on

  • 257 views

Types of volcanism and volcanic hazards.

Types of volcanism and volcanic hazards.

Statistics

Views

Total Views
257
Views on SlideShare
246
Embed Views
11

Actions

Likes
0
Downloads
2
Comments
0

1 Embed 11

http://kjleereadwriteweb.wikispaces.com 11

Accessibility

Categories

Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

    Earth Science - Volcanoes Earth Science - Volcanoes Presentation Transcript

    • The Fiery Earth
    • • There are 4 types of volcanism on Earth 1. Shield cones 2. Cinder cones 3. Composite cones 4. Fissure Eruptions
    • • Large volcanoes with broad bases and gently sloping sides – Lava composition is mafic – Few gases – Relatively quiet eruptions – Igneous rocks created: Basalt; some Scoria
    • Mauna Loa, Hawaii
    • Mauna Kea, Hawaii
    • • Small volcanoes with steep slopes – Lava composition is felsic, however generally low silica – Higher gas content – Explosive eruptions – Igneous rocks created: Scoria
    • Lava Butte, Oregon
    • Cerro Negro, Nicaragua
    • • Tall, steep volcanoes made of alternating layers of hardened lava flows. – Lava composition is felsic – Gases vary – Both quiet and explosive eruptions – Igneous rocks created: Pumice, Obsidian, Rhyolite
    • Mount St. Helens, Washington
    • Mount Pinatubo, Phillipines
    • • Fracture or crack from which lava erupts – Lava composition is mafic – Few gases – Quiet eruptions, repeated layers – Igneous rocks created: Basalt
    • • Tiny jagged pieces of rock and glass – After an eruption, wind can carry ash far away – Most settles on the land around the volcano
    • • Aa – jagged chunks of lava formed by rapid cooling.
    • • Pahoehoe – forms a wrinkled, ropy texture as the lava cools.
    • • A fast moving flow of mud, rocks, and debris – occurs when water from glaciers is released due to a volcanic eruption
    • • A fast-moving, dense, super-heated, poisonous gas cloud.
    • • Large clots of lava thrown out of an erupting volcano – while red-hot, spin through the air, cool, and develop a round or spindle shape.
    • Images 1. Ellen van den Berg, “The Skjaldbreiour Shield Volcano” September 2, 2009 via Flickr, Attribution- NonCommercial-NoDerivs License http://farm3.staticflickr.com/2422/3903567972_aab3c8429a_z.jpg 2. Dan Dzurisin, “Overlook Vent and Mauna Loa, Predawn” June 15, 2008 via Flickr, Attribution- NonCommercial-NoDerivs License http://farm4.staticflickr.com/3024/2582939400_e0aeeb30a2_z.jpg 3. Hector Parayuelos, “Maua Kea 1” September 5, 2009 via Flickr, Attribution-NonCommercial- NoDerivs License http://farm8.staticflickr.com/7168/6620817281_b2a6079619_z.jpg 4. Tim Rawle, “Cinder Cones of Hale Pohaku” March 25, 2009 via Flickr, Attribution-NonCommercial- NoDerivs License http://farm3.staticflickr.com/2436/3543949826_5540b79619_z.jpg 5. Rhiannon Boyle, “Lava Butte” August 2, 2010 via Flickr, Attribution-NonCommercial-NoDerivs License http://farm5.staticflickr.com/4080/4880719919_7aaa7082dd_z.jpg 6. Garrett Ziegler, “Cerro Negro, Nicaragua” May 29, 2012 via Flickr, Attribution-NonCommercial- NoDerivs License http://farm9.staticflickr.com/8025/7355197970_accf1e28df_z.jpg 7. Jessica, “Mount Fuji” November 16, 2012 via Flickr, Attribution-NonCommercial-NoDerivs License http://farm9.staticflickr.com/8204/8230795750_7e493a8f3a_z.jpg 8. Dave Schumaker, “Mount St. Helens” August 19, 2009 via Flickr, Attribution-NonCommercial- NoDerivs License http://farm4.staticflickr.com/3518/3844015809_40d284ab40_z.jpg
    • Images, continued 9. Storm Crypt, “Pinatubo’s Northeast Shore” August 16, 2008 via Flickr, Attribution-NonCommercial- NoDerivs License http://farm4.staticflickr.com/3128/2927114406_0e573f4175_z.jpg?zz=1 10. Islomaniac, “New lava fountain eruption from smoldering fissure” March 2011 via Flickr, Attribution License http://farm6.staticflickr.com/5175/5536447923_01e3470e13_o.jpg 11. Finnur Malmquist, “Eruption in Eyjafjallajokull” May 7, 2010 via Flickr, Attribution-NonCommercial- NoDerivs License http://farm5.staticflickr.com/4070/4588825332_58d859df97_z.jpg 12. ccarlstead, “Aa Lava Flow” January 13, 2011 via Flickr, Attribution-NonCommercial-NoDerivs License http://farm6.staticflickr.com/5171/5412138468_0c097402b8_z.jpg 13. Zack Jackson, “Lava” January 12, 2005 via Flickr, Attribution-NonCommercial-NoDerivs License http://farm4.staticflickr.com/3078/3241111818_78c08cc901_z.jpg 14. UWI Seismic Research Centre, “Lahar flow in Plymouth” May 20, 2005 via Flickr, Attribution- NonCommercial-NoDerivs License http://farm3.staticflickr.com/2443/3706671983_801e8f2989_z.jpg 15. gnuckx, “Italy Etna Volcano” October 27, 2008, Attribution License http://farm4.staticflickr.com/3484/3208523096_6ba9e9c115_z.jpg 16. GabeD, “Galapagos-Isabela” December 28, 2008 via Flickr, Attribution-NonCommercial-NoDerivs License http://farm4.staticflickr.com/3261/3203163476_5d233f099b_z.jpg?zz=1