Volcanoes NCES 6.E.2.2 Kim Lachler Updated 11/14

Eruption types

Eruption types Type 1 small amount of gas is trapped underground Not much pressure buildup Lava oozes out in a calm, steady flow Most gentle type of eruption

Eruption type Type 2 Small buildup of gas causes a noisy explosion Lava is thrown several hundred feet in the air Not as dangerous as some other types Most common on land

Eruption types Type 3 Sticky magma plugs up a volcano’s opening Gas builds up, causing pressure Explosion can throw debris as high as nine miles into the air Smaller explosions can occur for days, months, or years after the eruption

Type of eruption Type 4 Magma plugs up a volcano’s opening Pressure builds up behind the plug Blast can throw debris more than 15 miles into the air Most dangerous Parts of a mountain can be blown off

Lava types Aa Lava_on_Land_and_in_Water.mov lava pours out quickly and forms a brittle crust as it continues to flow it cause the crust to tear into jagged pieces

Lava types Pahoehoe lava pours out slowly like wax it is glassy with wrinkles

Lava types Pillow lava forms when lava erupts underwater forms round lumps

Lava types Blocky lava lava oozes out into heaps forming blocky chunks

Volcano types Shield volcanoes large, broad, gently sloping sides, lava flows easily formed from build up of layers

Volcano types Cinder Cone volcanoes small, steep cones formed from lava that dropped from the air after an explosive eruption short lived explosions

Volcano types Composite volcanoes (Stratovolcanoes) steep sided mountains, where plates collided. Has alternating layers of lava and rock. Mt. Fuji, Japan

Volcano types Fissure eruptions oozes from cracks in the earth’s surface

Ring of Fire Majority (not all) volcanoes are found in the “ring of fire” An area that circle the Pacific ocean. They are subduction, convergent boundaries.

Bibliography Holt, Rinehart & Winston, North Carolina, Holt, Rinehart & Winston, Orlando, Fl, 2005 Google images, volcanoes, http://www.google.com/images?hl=en&q=volcanoes&um=1&ie=UTF-8&source=univ&ei=ZK6zTP_wH4S8lQfj3Yi8Cg&sa=X&oi=image_result_group&ct=title&resnum=4&ved=0CD4QsAQwAw, accessed 10/11/10 Discovery school, Erupting volcano, http://school.discoveryeducation.com/clipart/clip/ani-cano-gif.html, accessed 10/11/10 Lava, http://en.wikipedia.org/wiki/Lava, accessed 10/11/10 Shield volcano, http://en.wikipedia.org/wiki/Shield_volcano, accessed 10/11/10 World Winds, Volcano type, http://www.google.com/imgres?imgurl=http://library.thinkquest.org/03oct/00795/images/typesc.GIF&imgrefurl=http://library.thinkquest.org/03oct/00795/voltypes.html&usg=__nK9mIC9OXp5jFrCNMotV8RbK3Ds=&h=236&w=265&sz=15&hl=en&start=10&zoom=1&um=1&itbs=1&tbnid=0X5M2vaCOvFQ1M:&tbnh=100&tbnw=112&prev=/images%3Fq%3Dvolcano%2Btypes%26um%3D1%26hl%3Den%26sa%3DG%26tbs%3Disch:1, accessed 10/11/10 USGS, fissure eruption, http://www.google.com/imgres?imgurl=http://volcanoes.usgs.gov/Imgs/Jpg/Photoglossary/fissure2_large.JPG&imgrefurl=http://volcanoes.usgs.gov/images/pglossary/FissureEruption_examps.php&usg=__tisxHzembTW25tOjMBqDVKibH8=&h=500&w=800&sz=52&hl=en&start=20&zoom=1&um=1&itbs=1&tbnid=Q3EI9ndvjYGwaM:&tbnh=89&tbnw=143&prev=/images%3Fq%3Dfissure%26um%3D1%26hl%3Den%26sa%3DG%26tbs%3Disch:1, accessed 10/11/10 Stratovolcano, http://en.wikipedia.org/wiki/Composite_volcano, accessed 10/11/10 Cinder cone, http://en.wikipedia.org/wiki/Cinder_cone_volcanoes, accessed 10/11/10 How valcanoes work, http://www.geology.sdsu.edu/how_volcanoes_work, accessed 10/12/10 Explore Learn, Convergent boundaries,http://khsappliedgeography.weebly.com/convergent-boundaries.html, accessed 11/11/14 Us energy info, geothermal basics, http://www.chamco.net/GeoThermal.htm, accessed 11/11/14