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? […]