Figure 1: Columbia River Gorge, Oregon. | Nature

Figure 1: Columbia River Gorge, Oregon.

From: Intraplate volcanism

Figure 1

Large, effusive outpourings of basalts, such as the Steens–Columbia River flood basalt in Oregon and Washington exposed here on the margins of the river, are usually attributed to the impingement of thermal plumes arising from the core–mantle boundary. Liu and Stegman show1 that the timing and distribution of eruption may instead be related to tears developed within subducting slabs.

Back to article page