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Volcanoes
1.
1. The minimum
number of seismograph stations necessary to determine the location of an earthquake is . 2. Which point below is the focus of the earthquake? 3. Which point below is the epicenter of the earthquake? A B 3 B A
2.
ReviewReview • P-waves • S-waves •
L-waves • Epicenter • Focus • Trilateration
3.
VolcanoesVolcanoes Any opening in
the Earth’s crust through which magma reaches the surface The openings are called vents
4.
VolcanoesVolcanoes When magma reaches the
surface it is called lava Hills or mountains are a result of this process
5.
6.
VolcanoesVolcanoes •3 types of
volcanoes
7.
Shield VolcanoesShield Volcanoes Broad
and rounded Made from stacks of runny basaltic lava
8.
9.
Mauna Loa, Hawaii
10.
Kilimanjaro, Africa
11.
Cinder ConeCinder Cone Smallest,
most abundant Violent eruptions with lots of ash Active for short time, then become dormant
12.
13.
Paricutin, MexicoParicutin, Mexico
14.
Composite ConeComposite Cone Steep
sided volcano made of alternating layers of cinders and lava Usually found along plate boundaries
15.
16.
Mount Fuji, JapanMount
Fuji, Japan
17.
OccurrencesOccurrences Most volcanoes occur at or near subduction zones
18.
Arenal Volcano, Costa
RicaArenal Volcano, Costa Rica
19.
20.
OccurrencesOccurrences Some occur near divergent
plate boundaries
21.
22.
IcelandIceland
23.
OccurrencesOccurrences Some occur in
the middle of plates Hot spot volcanoes
24.
Mauna Loa, Hawaii
25.
26.
Kilimanjaro, Africa
27.
28.
EruptionsEruptions •Different types of eruptions
29.
Explosive Quiet
30.
Different types of
LavaDifferent types of Lava Aa Lava
31.
Pahoehoe LavaPahoehoe Lava
32.
Skylight
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