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This photograph shows a fountain of liquid magma during the eruption of Stromboli volcano in Italy.
Click on image for full size
Image from Dr. J. Alean, Eglisau, Switzerland
For more information, images and video about Stromboli volcano see Stromboli On-Line.

Extrusive Igneous Rocks

These types of igneous rocks are made at places like volcanoes. There, red-hot lava spills above the surface of the Earth and cools pretty quickly. Quick cooling makes rocks with very little mineral crystals.

Take a look at the most common type of igneous rock! It is called basalt.

Find out more about extrusive igneous rocks by visiting our intermediate level page!


Last modified June 17, 2003 by Lisa Gardiner.

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The Fall 2010 issue of The Earth Scientist, focuses on rocks and minerals, including articles on minerals and mining, the use of minerals in society, and rare earth minerals, and includes 3 posters!

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