Rock varnish, formed on sandstone cliffs over long
Rock varnish, formed on sandstone cliffs over long period by bacterial action. Arches National Park, Utah
Picture No
10754767
Media ID
42871630
Size
5070px x 3380px
(1.6MB)
Credit
©Bob Gibbons / www.ardea.com
Category
NA
Ardea Picture Library
Picture No
10754767
Contributor Ref
ROG-12208





























