The geologic map of Grand Canyon National Park is a really good map. The canyon was formed when the river carved through layers and layers of sedimentary rock that had been laid down long before.

Why you should go to Olympic One of the most primeval parts of the lower 48 states, Olympic National Park covers nearly 1 million acres of the eponymous peninsula in Washington State—95 percent ...

Olympic National Park has a wealth of geological formations – including rocky islets along the coast formed by a continuously receding and changing coastline, deep canyons and valleys formed by ...