A surface of erosion that separates one layer of rock from another

The study of Earth's physical structure, its history, the processes acting on it, and the rocks of which it is composed

What we know about the Earth's layers come primarily from what kind of observations?

Check the 3 types of rock that make up the Earth's crust.

Where is there a greater pressure and higher temperature?

Which of the following represent physical weathering of rocks?

What material lays down most of Earth's sediments?

This type of rock is a result of volcanic activity and found in small amounts at the very top of the Grand Canyon.

A paleontologist discovers a fossil that is paper-thin and made up of mostly carbon. What fossilization process formed it?

Which perspective teaches that rock was formed through slow processes, much the same way we see it forming today?

Which group believe much of the geology we see today is the result of processes that occurred once in Earth's past and will not be repeated.