Examples of igneous rocks
![Examples of igneous rocks.](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/6%20igneous%20rocks.jpg?itok=js26u2fM)
Detailed Description
Examples of igneous rocks. Upper left: Yosemite National Park, Upper right: Sunset Crater Volcano National Monument, Lower left: Oahu, Hawaii, Lower right: Crater Lake National Park.
Sources/Usage
Public Domain.