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Division Creek, CA (0354)
In the center of the photo a very large volcanic flow of some sort -- looking around on the web I can't find what to call these sorts of formations, even though they're common across California. To get a sense of its size, note the trees in front and off to the left. On the lower left is a lava flow. Near Division Creek, just off US-395.
John Linton has particularly liked this photo