A series of lava flows erupted from Brushy Butte volcano form the dark forested line extending across the photo below the Big Valley Mountain fault scarp in the background. Lava Springs State Park north of the town of MacArthur marks the location of numerous springs that issue from the margin of the Brushy Butte lava flows to form Big Lake, the Little Tule River, and Falls River.

Photo by Lee Siebert, 1998 (Smithsonian Institution).

This image is made available under the Public Domain Dedication CC0 license, but proper attribution is appreciated.

Brushy Butte