Volcanoes Mountain composed of EXTRUSIVE IGNEOUS ROCKS DURING ERUPTION: GASES & LAVA –GASES...

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