Crossbedding in Tuff
Geology of Red Rock Canyon State Park, California
By Andrew Alden, About.com Guide
As ash was redistributed by streams, it formed these crossbeds in the resulting tuff. Sedimentary geologists can tell the exact geographic setting at a glance.
Photo (c) 2008 Andrew Alden, licensed to About.com
©2009 About.com, a part of The New York Times Company.
All rights reserved.