Polarized Light Microscopy Digital Image Gallery


Norite typically occurs as discrete intrusive masses or as layers in large, basic intrusions of other materials, as do gabbros, and the two cannot generally be distinguished from one another without the aid of a microscope. A particularly significant intrusion of norite can be found in Ontario, Canada. In fact, a cavity more than 30 meters deep has been excavated from this gigantic mass of rock in order to house the Sudbury Neutrino Observatory, which was designed to facilitate the detection of the elusive neutrino particles emitted from the core of the sun and exploding stars. The location was chosen for this one-of-a-kind building because the norite exhibits a relatively low level of radioactivity and acts as a natural shield, therefore, helping to ensure the unobstructed observation of neutrino events.

© 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: 7501
Microscopes provided by:
Visit the Nikon website. Visit the Olympus Microscopy Resource Center website.