Global Volcanism Program | Image GVP-06212
Toney Mountain in east-central Marie Byrd Land is an elongate ~55 x 15 km E-W volcanic massif with a ~2.8 km diameter central summit caldera and several satellite cones. It is almost entirely mantled by glaciers. The age of the most recent eruption of the volcano is unknown, but the youngest dated deposit is about 290,000 years ago.
Photo by Oscar González-Ferrán (University of Chile).
This image is made available under the Creative Commons BY-NC 4.0 license terms.