Earthquakes - collazocove
Download
Report
Transcript Earthquakes - collazocove
Earthquakes
By Josh and
Cody
How they happen
1. They form when plates move apart.
2. It depends how far the plates move apart to
how powerful the earthquake will be.
Faults
Normal faults cause tension in the earth’s crust
pulls rock apart.
Reverse faults are places in the rocks crust that
are pushed together
Strike slip fault is a fault that when plates
move past each other and start shearing
Sorry I cant fit a picture =[
Stress
Tension stress is a stress that pulls on the crust
Compression stress is stress that squeezes rock
until it folds or breaks
Shearing is stress that pushes a mass of rock in
two opposite directions.
Sorry that again I cant fit a picture =[
Folding Earths Crust
Sometimes plate movement causes the crust to
fold.
For example have you ever skidded on a rug
that wrinkled as your feet pushed it across the
floor? If so that’s what folding the crust is like!
Tension
Tension is a type of stress that constantly is
pulling on the earth’s crust.