Transcript Volcanoes - Buncombe County Schools

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
Lava_on_Land_and_in_Water.mov

Aa

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
Types_of_Volcanoes. mov

Volcanoe type.mov
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
The_Ring_of_Fire.mov
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=UTF8&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%26s
a%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://volcano
es.usgs.gov/images/pglossary/FissureEruption_examps.php&usg=__tisxHzembTW25tOjMBqDVKibH8=&h=500&w=800&sz=52&hl=en&s
tart=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
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