North Sister volcano's east face (750 m, 2460 ft high) consists of ...

North Sister volcano's east face (750 m, 2460 ft high) consists of ...

Detailed Description

East face of North Sister, 750 m high. Consists of about 100 thin mafic lava flows and intercalated layers of red scoria, capped by thick summit lava flows. Remnant of Thayer Glacier feeds cirque lake. Pervasively altered yellow-orange buttress on right, 250 m thick, consists of east-dipping, palagonitized, ash-rich fragmental flow deposits.

Details

Image Dimensions: 3300 x 2200

Source:


Hildreth et al., 2013