Polarized Light Microscopy Digital Image Gallery

Volcanic Ash

Found predominantly along plate tectonic boundaries, volcanoes erupt in a number of different ways and emit a variety of materials, including magma, gases, and pyroclastic rocks. These rocks are typically referred to by different names depending upon their size. The smallest pyroclastic rocks, which are no larger than sand grains, are called volcanic ash. Larger varieties are known as cinders or volcanic bombs, which may be as great as four feet in diameter.


© 1995-2022 by Michael W. Davidson and The Florida State University. All Rights Reserved. No images, graphics, software, scripts, or applets may be reproduced or used in any manner without permission from the copyright holders. Use of this website means you agree to all of the Legal Terms and Conditions set forth by the owners.
This website is maintained by our
Graphics & Web Programming Team
in collaboration with Optical Microscopy at the
National High Magnetic Field Laboratory.
Last modification: Thursday, Nov 20, 2003 at 02:51 PM
Access Count Since November 20, 2003: 7725
Microscopes provided by:
Visit the Nikon website. Visit the Olympus Microscopy Resource Center website.