Polarized Light Microscopy Digital Image Gallery

Dacite

In magma form, dacite is extremely viscous, hindering it from moving very far away from its point of eruption before it cools and solidifies. The substance is, therefore, highly involved in the creation of thick volcanic domes. Dacite, which typically erupts at temperatures that range between 800 and 1000 degrees Celsius, is also one of the rocks most commonly associated with the large volcanic explosions called Plinian eruptions. Named for Pliny the Younger, who in 79 AD recorded the catastrophic effects of the Vesuvius eruption, Plinian eruptions are characterized by the large quantities of solid particles (tephra) and gas they exude high into the stratosphere.


© 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 03:51 PM
Access Count Since November 20, 2003: 7841
Microscopes provided by:
Visit the Nikon website. Visit the Olympus Microscopy Resource Center website.