Rock and Minerals

  • 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.

  • How Do Sedimentary Rocks Form?

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

  • 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?