Polarized Light Microscopy Digital Image Gallery

Quartz Monzonite Porphyry

Quartz monzonite is a granitic rock that is primarily composed of quartz, plagioclase feldspar, and orthoclase feldspar. Other minerals, such as biotite and hornblende, are also typically present in small amounts. Abundant and widespread, the intrusive igneous rock may be found in tremendous masses in many mountainous areas. Quartz monzonite is also frequently involved in gorge formation since it is extremely resistant to weathering and stands tall as surrounding rocks erode away. Indeed, a prime example of this type of gorge is the Black Canyon of the Gunnison in Colorado, which owes its steep walls to the hardness of the rock that has successfully withstood the force of the Gunnison River for two million years.

© 1995-2019 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 03:12 PM
Access Count Since November 20, 2003: 7438
Microscopes provided by:
Visit the Nikon website. Visit the Olympus Microscopy Resource Center website.