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Transcript

Plate Tectonics

is supported by

is based on

wet

matching coastlines

similar fossils

glacier deposites

dry

made of many

Alfred Wegener's theory of continental displacement

granitic

magma

Plate Boundaries

basaltic

magma

also know as

explosive

Divergent Plates

Convergent Plates

quiet

have both

explosions are

Continental Drift

Mg, Fe

K, Na, Al

mafic

felsic

shield

composite

more

dense

less

dense

plates

Oceanic

cinder cone

Continental

three kinds

can be

volcanoes

oceanic/continental

convergent

Hot spot

oceanic/oceanic divergent

Mid-ocean ridge-

new crust is formed

continental/continental

divergent

Continental/continental

convergent

Creates Mountains

oceanic/oceanic

convergent

transforms bondaries

side to side

Creates Islands

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