Pictures of Metamorphic Rocks
Photos of Common Foliated and Non-Foliated Metamorphic Rock Types
Article by: Hobart M. King, Ph.D., RPG
What are Metamorphic Rocks?
Metamorphic rocks have been modified by heat, pressure, and chemical processes, usually while buried deep below Earth's surface. Exposure to these extreme conditions has altered the mineralogy, texture, and chemical composition of the rocks.
There are two basic types of metamorphic rocks. Foliated metamorphic rocks such as gneiss, phyllite, schist, and slate have a layered or banded appearance that is produced by exposure to heat and directed pressure.
Non-foliated metamorphic rocks such as hornfels, marble, quartzite, and novaculite do not have a layered or banded appearance. Pictures and brief descriptions of some common types of metamorphic rocks are shown on this page.
|The Rock Used to Make Beer|
|Sliding Rocks on Racetrack Playa|
|Rock, Mineral and Fossil Collections.|