Rocks and the Rock Cycle Igneous, Sedimentary, and Metamorphic varieties.
What is a rock? A rock is a combination of minerals. For example: Granite is composed of biotite, quartz, and feldspar.
Geology of National Parks YosemiteYosemite Grand Canyon Bryce Canyon Lassen Peak Volcanic YellowstoneYellowstone Instructor: Jack Pierce Instructor:
