Grand canyon
The Grand Canyon is located in Arizona in the United States and is the 15th oldest national park. Some believe it is 6 million years old others say it's almost 70 million years old, that's back when the dinosaurs roamed the earth. There has been no confirmed age but scientist are still researching. It is 446km long, 29km wide and 800m in depth and has a river that is 277miles long. It has many rocks types some common ones are.
- Quartz
- Calcite
- Clay
- gypsum
- Dolomite
- Hematite
- Feldspar
- And more...
- Copper
- Sliver
- Uranium