Boring Lava Field

Boring Lava Field

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Boring Lava Field

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Description:
The Boring Lava Field is an extinct Plio-Pleistocene volcanic field zone with at least 32 cinder cones and small shield volcanoes lying within a radius of 13 miles (21 km) of Kelly Butte, which is approximately 4 miles (6 km) east of downtown Portland, Oregon, in the United States. The name is derived from the town of Boring, Oregon, which lies just to the southeast of the most dense cluster of lava vents. The zone became active at least 2.7 million years ago, and has been extinct for about 300,000 years.

The Portland metropolitan area, including suburbs, is one of the few places in the continental United States to have extinct volcanoes within a city's limits; Bend, Oregon is another.



Oregon vents

<gallery>File:WillametteRvrPano_edit.jpg|The buttes of the Boring Lava Field are visible toward the center of this panorama of Portland, Oregon</gallery>The following vents are in Oregon:
 

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