Grand Canyon Age

How Was the Grand Canyon Formed?

Like a stack of pancakes, younger rock layers pile on top of older layers. We use the law of superposition to reveal Earth’s age and Grand Canyon geology.

Sedimentary Rocks

How Do Sedimentary Rocks Form?

Sedimentary rocks form from two key processes. First, compaction squeezes material together. Second, cementing glues the squeezed material together.

Types of Rocks

What Are the 3 Types of Rocks?

Earth is covered with these 3 types of rocks are: (1) sedimentary rocks (2) metamorphic rocks and (3) igneous rocks. How they are different from each other?