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Ch. 8 Plate Tectonics

Across
Movement of mantle material which drives the the movement of the continental plates
A idea proposed by Alfred Wegener which suggested the continents moves away from their orginal postion
A large block of lithospheric plate that has been moved over great distances
The core of each continent; most formed 2.5 billion years ago
Most divergent boundaries lie along the ocean floor and have deep valleys at the center
Boundaries between plates that are sliding past east other
1 billion year old super continent
Oceanic plates that plunge beneath each other
One of two 180 million year old land masses which broke off from Pangaea
German geologist who developed the theory of plate tectonics
The force of the sinking edge of a plate exerts on the rest of the plate
The theory used to explain the formation, movement and interaction of continental plates
Down
Boundary where 2 lithosphereic plate move apart
Caused by a subduction zone
A boundary where 2 or more plates move towards each other
A continental boundary where 2 continent are pushed together and welded into a larger continent. The collision causes the crust to push up forming mountains
Sea-floor spreading where molten rock forces its way up through cracks
Underground shifting of the of the earth
A long chain of volcanic mountains on the ocean floor
Force used to push or drive ocean plates apart; sometimes called gravitational sliding
200 million year old land mass also called a super continent