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Volcanoes & Earthquakes

Across
Fault that occurs when rocks move horizontally past each other
Where magma deep within the mantle metls through the crust
Pocket under volcano where magma collects
Area covered by lava as it pours from vent
Slowest moving and most destructive waves
Fault that occurs when rocks move around
Constructive force that adds new rock to existing land
One major volcanic belt where volcanos surrond the pacific ocean
When magma reaches the surface
Faults that push together until a section of rocks moves upward
Measures magnitude of earthquakes waves and assigns it a sign
Most abundant minerals on crust and mantle
Opening where magma and gas leaves the volcano
Down
Vibrations moving out from focus
Machine that detects size, times and molecules of an earthquakes
Molten mixture of rock
Occur when rocks shift suddenly along plate boundaries
Scale based on destruction made by many measures and observable destruction
Beginning part of an earthquake
Breaks in the earths surface along which rocks can move
Occur beneath the surface
Less dense and causes magma to flow into cracks
Weak spot in earths crust where magma comes to the surface
Bowl shaped area that forms around the vent
Long tube that moves from chamber to surface