One simple and easy way that scientists can accurately date fossils found is through the ground levels. When you take a big chunk out of the earth, you can see the changes in the texture in the "ground" Each "layer" represents a set of years. And as you get further and further into the ground, fossils become older and older.
The process that is responsible for the formation of a normal fault is
when horizontal stresses occurs in brittle rocks and the hanging wall blocks moves down relative to the footwall blocks
hope this helps
