Tufa Tower at Trona Pinnacles
From Andrew Alden, About.com
The tufa towers at Trona Pinnacles are as tall as 40 meters. Some may have been taller, but humans have cut down some towers over the last 150 years.
Photo (c) 2008 Andrew Alden, licensed to About.com
©2009 About.com, a part of The New York Times Company.
All rights reserved.