Hood

Scientists from the U.S. Geological Survey take gas samples at Devils Kitchen near the Crater Rock lava dome on the upper SW flank of Mount Hood. The Crater Rock area is the largest fumarole field in the Oregon Cascades, producing vigorous gas emission and extensive hydrothermal alteration of rock masses over broad areas.

Hood

A massive volcanic mudflow produced by collapse of Mount Hood during the Pleistocene swept down the Hood River valley and traveled across the Columbia River, temporarily damming it to a depth of 30 m. This thick outcrop of the mudflow deposit, containing rounded boulders in a clay-rich matrix, is located north of Underwood, Washington, on the other side of the Columbia River.