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VOLCANOES (WHY DO THEY OCCUR (TECTONIC PLATES COLLIDE (MANTLE MELTS…
VOLCANOES
WHY DO THEY OCCUR
TECTONIC PLATES COLLIDE
MANTLE MELTS CREATES MAGMA
MAGMA PUSHES UPWARD
CRACKS CRUST
MAGMA COLLECTS UNDER EARTHS SURFACE
CALLED MAGMA CHAMBERS
PRESSURE OR CRACK IN CRUST MAGMA FORCED UP THE VENT AND SHOOTS OUT CRATER
CALLED ERUPTIONS
ERUPTIONS CAUSE LAVE AND HOT ASH FLOW MUD SLIDES AVALANCHES FALLING ASH AND FLOODS
WHERE ARE VOLCANEOS
BETWEEN 50 AND 70 ACTIVE VOLCANOES
LOCATED AROUND EDGE OF PACIFIC OCEAN
WEST COAST AMERICA
EAST COAST SIBERIA JAPAN PHILIPPINES INDONESIA
ISLAND CHAINS FROM NEW GUINEA NEW ZEALAND
CALLED RING OF FIRE
RECENT ACTIVE VOLCANOES FOUND IN
ICELAND
KENYA RIFT VALLEY
ITALY
HAWAII
MOSTLY OCCUR ON THE EDGE OF LARGE TECTONIC PLATES
BASIC KINDS OF VOLCANEOS
SHIELD
CINDER CONE
COMPOSITE
RING OF FIRE AND HOT SPOTS
HOT SPOTS
VOLCANIC REGIONS
LOTS OF VOLCANIC ACTION
THINK MANTLE IS
TWO FAMOUS HOT SPOTS
HAWAIIAN
CHAIN 6 000 KM ACROSS PACIFIC OCEAN
YELLOW STONE
CHAIN IN AMERICA 650 KM LONG
RING OF FIRE
LARGE NUMBER OF EARTHQUAKES AND VOLCANIC ERUPTION
BASIN OF PACIFIC OCEAN
452 VOLCANOES
50% ACTIVE VLCANOES
90% EARTHQUAKES 81% OF LARGEST
WHY?
TECTONIC PLATES COLLIDE CONTINUOUSLY
MOUNTAIN OR HILL
LAVE ROCK ASH AND GASES ERUPT