An Earthquake is the movement between plates when collided together. Earthquakes can also be pushed together or pulled apart. Many earthquakes cause most of mountains and volcanic issues. The earths crust is broken into large segments called crustal plates. There are six large crustal plates and several smaller ones. When these plates collide it creates a movement through the earth and shakes it up.
Rock layers slide past each other along crack lines called faults.
A normal fault : Pulled Apart. With a Angle of 60 degrees. E.G. The Red Sea.
A Reverse Fault : Compression. With a Angle of 30 degrees. E.G. The Rocky Mountains
Strike Slip : Opposite Directions. With a Angle of 90 degrees.E.G. San Andreas Fault.
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