Boring Lava, Oregon

Boring Lava is a monogenetic volcanic field made of up to 50 cinder cones an small shield volcanoes. Most of this volcanic field is in the city of Portland and about 60 miles (100 km) west of Mount Hood and the axis of the Cascades. Boring Lava volcanism began about 2.7 million years ago and ended about 300,000 years ago. The volcanic field is named for the town of Boring. This photo shows Highland Butte a small shield volcano. Photo courtesy of the Oregon Department of Geology and Mineral Industries. Special thanks to Rosemary Kenney.

Mount Tabor, in Mount Tabor State Park, is a cinder cone in the Boring Lava volcanic field. Part of the cones has been excavated to make an amphitheater. Photo courtesy of the Oregon Department of Geology and Mineral Industries.

Source of Information:

Wood, C.A., and Kienle, J., 1993, Volcanoes of North America: Cambridge University Press, New York, 354 p.

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