View of the Columbia River Gorge north of the Ginkgo Petrified
Forest visitor center. The boulder in the foreground is a vesicular basalt
(lava rock filled with gas bubbles that formed when the rock was still in
a molten state).
The URL is: https://gotbooks.miracosta.edu/gonp/grandcoulee/html/gc679.htm
Last modified: 1/5/2011