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Inside Earth 2:1

Chapter 2:1 Earth's Crust in motion

TermDefinition
stress A force acting on rock to change its shape or volume.
shearing Stress that pushes masses of rock in opposite directions.
compression Stress that squeezes rock until it folds or breaks.
tension Stress that stretches rock so that it becomes thinner in the middle.
deformation A change in the volume or shape of Earth’s crust.
fault a break in Earth's crust where slabs of rock slip past each other.
strike-slip fault A fault where rocks on either side move past each other sideways with little up-or-down motion.
normal fault A fault where the hanging wall slides downward; caused by tension in the crust.
hanging wall The block of rock that lies above a fault line.
footwall The block of rock that lies below the fault line.
reverse fault A type of fault where the hanging wall slides upward.
fault-block mountain A mountain that forms where a normal fault uplifts a block of rock.
fold A bend in rock that forms where part of Earth’s crust is compressed.
anticline An upward fold in rock formed by compression of Earth’s crust.
syncline A downward fold in rock formed by compression in Earth’s crust.
plateau A large area of flat land elevated high above sea level.
Created by: boltonoli12
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