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chap. 6 .


plate upper mantle that moves around on the athenosphere
fault surface along which rocks move when they pass their elastic limit and break
earthquake vibarations produced when rocks break along a fault
normal fault rock above the fault surfaces moves down relative to the rock below the fault surface
reverse fault break in rock caused by compressive forces, where rock above the fault surface moves upward relative to the rock below the fault surface
strike-slip fault break in rock caused by shear forces, where rocks move past each other without much vertical movement
wave rhythmic movement that carries energy through matter and space
seismic wave wave generated by earthquake
focus the point where this energy release first occurs
primary wave cause particals in rocks to move back and forth in the direction that the wave is traveling
secondary wave cause of particals to move at right angles to the direction of wave travel
surface wave move rock particals in a backward rolling motion
epicenter is the point on earth's surface directly
Created by: andrews