How unconformities and folding can alter/change the order of rock layers?

Question

This is for a study guide. And this is probably one question that I am having trouble with so far. Please help me if you can. Thanks

Answer 1

An excellent description of this phenomenon can be found at the following address

 

http://en.wikipedia.org/wiki/Unconformity

 

Folding is caused by earthquakes, and, as the name suggests, represents displacement of lower rock layers above younger layers. Usually, folding is easy to see.