Igneous Rocks

Physical Geology

Igneous Rocks

Chapter Objectives


Class Notes

Internet Resources

  1. Granites

    Granites constitute (for the most part) the continental crust.

    "a very hard natural igneous rock formation of visibly crystalline texture formed essentially of quartz and orthoclase or microcline and used for building and for monuments 2: unyielding firmness or endurance

    [Why is granite like ice cream?]

  2. Review - Mantle Convection

  3. Meteorites

    Although not all meteorites are of igneous origin, many appear to have crystallized from a melt.

    "The term meteor comes from the Greek meteoron, meaning phenomenon in the sky. It is used to describe the streak of light produced as matter in the solar system falls into Earth's atmosphere creating temporary incandescence resulting from atmospheric friction."

  4. Volcanism in the Cascades

    Your semester project involves the geology of the Cascade Mountains. Here is a place to get started.

A Virtual Field Trip to the Mount Airy Granite Quarry

    Granites and other igneous rocks are often used in the construction industry and for decorative facings, monuments and memorials. The Mount Airy Granite Quarry virtual field trip provides a good introduction to this topic.

    "The town of Mount Airy is located in the northwestern part of North Carolina and is home to the largest open-faced quarry in the world. The North Carolina Granite Corporation has been quarrying white granite at this location since 1904, but the history of the quarry goes back even farther than that."

    Learning about geology from a computer screen is only half as fun as enjoying it in the field!



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Copyright by John C. Butler, July 29, 1995