USGS banner
Columbia River Gorge at Ginko Fossil Forest State Park
View of the Columbia River Gorge north of the Ginko 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).
Next Image Return to Main Page

U.S. Department of the Interior - U.S. Geological Survey - Geology Discipline
Privacy statement -- General disclaimer -- Accessibility
The URL of this page is: http://3dparks.wr.usgs.gov/grandcoulee/html/gc679.htm
Maintained by Webmaster, Menlo Park, CA
Last modified: 5/16/2004 (ps)

www.usa.gov: Your first click to the U.S. Government