Fracking is when you get a liquid with a higher pressure and inject it in to a type of rock .But the rock has to have a high pressure .You can inject it into certain types of rocks.
It is also a way of getting gas out of rock it is a new way when doing so you can get oil as well you can use sedimentary rocks .The rock that you take it from are 2,00 to 10,000 feet deep .It takes out of the rock and is used .
I hope that helps you
