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Home > College of Arts and Sciences > Geology > Mineral Samples > Igneous Rocks

Igneous Rocks

Igneous rocks are formed from the solidification of molten rock material. There are two basic types: 1) intrusive igneous rocks such as diorite, gabbro, granite and pegmatite that solidify below the Earth’s surface; and 2) extrusive igneous rocks such as andesite, basalt, obsidian, pumice, rhyolite and scoria that solidify on or above the Earth’s surface.
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  • Basalt

    Basalt

  • Basalt Porphyry

    Basalt Porphyry

  • Dunite

    Dunite

  • Gabbro

    Gabbro

  • Granite

    Granite

  • Granite

    Granite

  • Obsidian

    Obsidian

  • Pegmatite

    Pegmatite

  • Pumice

    Pumice

  • Rhyolite (gray)

    Rhyolite (gray)

  • Rhyolite (pink)

    Rhyolite (pink)

  • Scoria

    Scoria

 
 
 

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