Volcanoes Mountain composed of EXTRUSIVE IGNEOUS ROCKS DURING ERUPTION: GASES & LAVA –GASES & LAVA escape onto EARTH ’ S SURFACE or ATMOSPHERE -Exit through.

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Presentation transcript:

Volcanoes Mountain composed of EXTRUSIVE IGNEOUS ROCKS DURING ERUPTION: GASES & LAVA –GASES & LAVA escape onto EARTH ’ S SURFACE or ATMOSPHERE -Exit through opening or vent of a volcano VOLCANO WORLD

Olympus Mons

Rock Features Formed INTRUSIONS Intrusive Igneous rocks from MAGMA Stays within the LITHOSPHERE Intrusion

EXTRUSIONS Extrusive Igneous rock from LAVA LAVA FLOWS occur TEMPERATURES: 1000 o C

3 Main types of Volcanoes CINDER-CONE STEEP, SMALL, Composed of Volcanic ASH COMPOSITE-CONE – STEEP, LARGE Composed of LAVA & Volcanic ASH

BEFORE AFTER

SHIELD VOLCANO GENTLE slope composed of Volcanic LAVA

DANGERS of ERUPTION Mudslides & Flooding GAS RELEASE: - Sulfur, Chlorine, & CO 2 Volcanic ASH BLOCKING Sun ’ s Ray (COOLING of Earth)

Mount Vesuvius Victims 79 AD

Predicting Volcanic Eruptions SATELLITES SATELLITES: HEAT -Report on increasing HEAT from magma TILT METERS: SLOPEINFLATES -Increased SLOPE as volcano INFLATES with magma INCREASES Monitor INCREASES in 1) Elevation 2) Width 3) Number of EARTHQUAKES

State the most likely affect the ASH CLOUD had on April 25, 1982