Volcanoes Mountain composed of EXTRUSIVE IGNEOUS ROCKS DURING ERUPTION: GASES & LAVA –GASES & LAVA...
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Transcript of Volcanoes Mountain composed of EXTRUSIVE IGNEOUS ROCKS DURING ERUPTION: GASES & LAVA –GASES & LAVA...
Volcanoes• Mountain composed of EXTRUSIVE IGNEOUS ROCKSEXTRUSIVE IGNEOUS ROCKS
DURING ERUPTION: –GASES & LAVAGASES & LAVA escape onto EARTH’S SURFACE or ATMOSPHERE -Exit through opening or vent of a volcano
VOLCANO WORLD
Olympus MonsOlympus Mons
Rock Features FormedINTRUSIONSINTRUSIONS• Intrusive Igneous rocks from MAGMA• Stays within the LITHOSPHERE
IntrusionIntrusion
EXTRUSIONSEXTRUSIONS• Extrusive Igneous rock from LAVA• LAVA FLOWS occur
TEMPERATURES: 1000oC
3 Main types of Volcanoes
CINDER-CONECINDER-CONE • STEEP, SMALL, Composed of
Volcanic ASH
COMPOSITE-CONECOMPOSITE-CONE –STEEP, LARGE Composed of LAVA & Volcanic ASH
BEFORE
AFTER
SHIELD VOLCANOSHIELD VOLCANO•GENTLE slope composed of Volcanic LAVA
DANGERS of ERUPTION
• Mudslides & Flooding
GAS RELEASE: -Sulfur, Chlorine, & CO2
• Volcanic ASH BLOCKING Sun’s Ray
(COOLING of Earth)
Mount Vesuvius Victims
79 AD
Predicting Volcanic Eruptions
SATELLITESSATELLITES: -Report on increasing HEATHEAT from magma
TILT METERS:TILT METERS: -Increased SLOPESLOPE as volcano INFLATESINFLATES with
magma
Monitor INCREASESINCREASES in 1) Elevation 2) Width 3) Number of EARTHQUAKES
State the most likely affect the ASH CLOUD had on April 25, 1982