Ultramafic Rock

Ultramafic Rock

Ultramafic (also referred to as ultrabasic) rocks are igneous and meta-igneous rocks with very low silica content (less than 45%), generally >18% MgO, high FeO, low potassium, and are composed of usually greater than 90% mafic minerals (dark colored, high magnesium and iron content). The Earth's mantle is composed of ultramafic rocks.

Read more about Ultramafic Rock:  Intrusive Ultramafic Rocks, Volcanic Ultramafic Rocks, Ultrapotassic Ultramafic Rocks, Metamorphic Ultramafic Rocks, Distribution in Space and Time, Soil and Regolith Developed On Ultramafic Rock

Famous quotes containing the word rock:

    Most rock journalism is people who can’t write, interviewing people who can’t talk, for people who can’t read.
    Frank Zappa (1940–1994)