Download - Volcano and Bathymetric Map
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What is a volcano?
A volcanois a site where melted rock and other
materials from arth!s mantle are released"
#$ring an er$ption% melted rock called magma
leaves the magma cham&erand moves $p the
conduit" 'he magma leaves the cond$it at the
vent"
Magma is called lavaafter it leaves the vent"
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vent$ally the er$ption
ends and the volcano
vent &ecomes a &owl-
like calderaor
res$rgent domeor lava
lake"
(es$rgent dome
Cinder Cone
Lake
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A volcanic neckis the solid remains
of magma that filled the cond$it"
As the volcano erodes% a core of
solid magma gets e)posed"
*raniteis an igneo$srock and is
formed from magma"
#evil!s 'ower at Wyoming'he granite peaks in Chile
http+,,www"landforms"e$
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'he top of an active mantle pl$me is called a hot
spot"
As the plate moves% it carries the volcanic island
away from the active hot spot"
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awaii!s .slands are Volcanic Chains
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#eterminedirection of
movement
C$rrently% the hot spot is makingthe $ndersea volcano Loihi to
the so$theast of the island"
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Bathymetric Map - A bathymetric mapshows what the ocean floor wo$ld look like if all the water drained o$t
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Obvious Divergent Boundaries -trace over the ridges and rises 0white
areas5"
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Obvious Convergent Boundaries - trace over the trenches"
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Earthquake and
Volcano Data
EQ Magnitude less than 5.0
EQ Magnitude 5.0 to 6.9
EQ Magnitude 7.0 and above
Volcano
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Ma8or 'ectonic 7lates
American
Plate
Eurasian
Plate
Indo-Australian
Plate
Pacific Plate
Eurasian
Plate
Antarctic
Plate
African Plate
NazcaPlate
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What is the direction of motion for the
maor plates!
Held
stationary
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Volcano /ila$ea
in awaii49":4;< north latit$de
4=="2>;< west longit$de"
(ight on top of awaiian ot6pot
6hallow Magma (eservoir Most active volcano on arth
B$t gentle% with V. 3 0Volcanic)plosive .nde)5
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Mo$nt 6t" elen ":@"23 % 422"41 W5
y8af8alla8k$ll Volcano in .celand 0@;"@; degrees
49"@2 degrees W5 - recent er$ption March % 2343 a
relatively small glacier in .celand whose icecap covers an
active volcano some 4%@@@ meters 0=%:@@ feet5 high"
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Mo$nt tna% .taly $ropeDs highest and most
active volcano" located a&ove a s$&d$ction Eone
formed where the $rasian and
African plates collide% which also
prod$ced Ves$vi$s and Campi
Flegrei"
http+,,geology"com,volcanoes,etna,
6$&d$ctoin one
Latit$de+ ;>
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#rakatoa$ %ndonesia
A Volcanic island &etweenIava and 6$matra in
.ndonesia% growing &y 2cm
per day"
)ploded in 411;% killing ;@%:4>
people" Lo$dest so$nd ever heard in
modern history% &eing heardnearly ;%333 miles away" 's$nami over ;33 meters high" 'he sky darkened worldwide for
years" http+,,icecreamgram"&logspot"com,2342,34,krakatoa"html
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&ount 'inatubo in 'hilippine
'he 4994 er$ption prod$ced the second largest terrestrial er$ption of the
23th cent$ry 02nd to the 4942 er$ption of /atmai in the Alaska 5
'he caldera wass$&seJ$ently filled withwater from monsoon rains
and a crater lake was
formed" *lo&al temperat$res
dropped &y a&o$t 3"=
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ovar$pta% Alaska
A new volcano formed in 4992" 'he 4992 V.-@ er$ption lasted @3 ho$rs
long and released ;3 times the vol$me of
magma as the 4913 er$ption of Mo$nt 6t"
elens"
ear&y /atmai has V. ; in 4992"
http+,,en"wikipedia"org,wiki,Mo$ntK/atmai
ovar$pta
/atmai
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(ernandina %sland
the third largest% and yo$ngest%
island of the *alpagos .slands"
'he islands were formed &y the
*alpagos hotspot" 'he island is an active shield
volcano that has &een er$pting
since April 44% 2339"
http+,,en"wikipedia"org,wiki,FernandinaK.sland
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