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Mt St Helens Before
VOLCANOES
Reading: Chapter 9
Pages 224-242
Review Questions
1, 2, 3, 5, 9, 10, 11, 12
http://www.ncusd203.org/north/depts/science/slack/mt_helens.html
Ash of Mt St Helens
MtStHelens
http://www.geology.mcmail.com/volcanoes.htm
Mt St Helens After
http://ve.ou.edu/weaver/st_helens/sthelens.htm
http://www.ncusd203.org/north/depts/science/slack/mt_helens.html
1
Sept. 2002
Volcanocam see http://www.fs.fed.us/gpnf/volcanocams/msh/
Photo credit see http://www.roddyscheer.com/mt_st_helens.html
Lava character
http://ve.ou.edu/weaver/st_helens/sthelens.htm
Pahoehoe lava
http://www.doubledeckerpress.com/pahoe.htm
Pahoehoe
Pahoehoe
http://gaia.busanedu.net/~creative/2002/cyber/rock/pages/20651_pahoehoe.htm
http://www.mistermoose.org/rtw/usa/hawaii/pahoehoe.html
2
AA
Volcanic bombs
http://www.windows.ucar.edu/earth/geology/images/aa_pahoehoe_lg.jpg
http://volcanoes.usgs.gov/Products/Pglossary/bomb.html
bomb
http://www.wooster.edu/geology/bjordan/ECalPics/ECal.html
http://www.volcanicimages.com/krakatau/krakatau.html
Kilauea
spatter cone
http://www.wooster.edu/geology/bjordan/ECalPics/ECal.html
http://www.billystudio.com/photo_album/Big_Island/Volcano_Park_Slide/pages/Kilauea%20Spatter%20Cone%201984.htm
3
Composite cone
http://courses.unt.edu/hwilliams/GEOG_3350/examreviews/volcanic_structures.htm
Shield volcano
http://volcanoes.usgs.gov/Products/Pglossary/ShieldVolcano.html
Lava fountain from fissure
Shield volcano
http://earth.geol.ksu.edu/sgao/g100tu/plots/1008_shield_volc.jpg
Curtain of fire
http://www.uhh.hawaii.edu/~csav/gallery/decker/hawaii_curtain_of_fire.php
Active Lava Tube
http://www.doubledeckerpress.com/skylight.htm
4
Aspects of volcano types
Cinder cone
Cinder cones
Paricutin
http://www.greenville.k12.oh.us/volcano/cindercone.html
http://courses.unt.edu/hwilliams/GEOG_3350/examreviews/volcanic_structures.htm
Ash from Paricutin
Paricutin
http://www.bol.ucla.edu/~asuarezn/Paricutin_page.html
http://www.greenville.k12.oh.us/volcano/cindercone.html
5
San Juan Parangaricutiro
Mt Etna
http://www.bol.ucla.edu/~asuarezn/Paricutin_page.html
http://rst.gsfc.nasa.gov/Sect13/Sect13_4d.html
http://www.geog.utah.edu/~hmiller/photos/Mt_Hood.jpg
Composite cone
Mt Hood
http://courses.unt.edu/hwilliams/GEOG_3350/examreviews/volcanic_structures.htm
Fujiyama
Blasted summit of Mt. St. Helens
http://earth.geol.ksu.edu/sgao/g100tu/plots/1008_composite_volc_Fujiyama.jpg
http://ve.ou.edu/weaver/st_helens/sthelens.htm
6
Whaleback dome in Mt. St. Helens
Nuee Ardente
http://ve.ou.edu/weaver/st_helens/sthelens.htm
Martinique
http://ve.ou.edu/weaver/st_helens/sthelens.htm
Video of nuee ardente: http://www.bedford.k12.ny.us/flhs/science/apes/images.html
Lahar
http://ve.ou.edu/weaver/st_helens/sthelens.htm
7
Crater Lake
Caldera initial stage
Caldera final stage
Valles Grande
http://ve.ou.edu/weaver/votw/valles.htm
http://hvo.wr.usgs.gov/howwork/subsidence/inflate_deflate.html
http://satftp.soest.hawaii.edu/space/hawaii/nav/ap.kilauea.html
8
http://hvo.wr.usgs.gov/howwork/subsidence/inflate_deflate.html
Flood basalt
http://hvo.wr.usgs.gov/howwork/subsidence/inflate_deflate.html
Flood basalt
http://www.bedford.k12.ny.us/flhs/science/images/floodbasalt.jpg
Flood basalt
http://www.gly.uga.edu/railsback/FieldImages/BasaltTwinFalls.jpeg
Deccan basalt
http://www.accuracyingenesis.com/deccan.html
9
Shiprock
Volcanic summary
http://www.uwosh.edu/faculty_staff/muldoon/51-360/Moes_pics/pages/6B_Ship_Rock_gif.htm
10
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