Antarctica's tallest volcano
Along a 900-kilometre (560-mile) stretch of Antarctica's Pacific Coast, 18 major volcanoes jut from the ice sheet. The chain, similar in size to the Cascade volcanic chain in North America, is home to the continent's tallest volcano-Mount Sidley. (Not to be confused with Vinson Massif, Antarctica's tallest mountain.)
This image of Mount Sidley was acquired on 20 November 2014, by the Operational Land Imager (OLI) on Landsat 8. The volcano stands about 4,200 metres (13,800 feet) above sea level and 2,200 metres (7,200 feet) above ice level. The caldera wall, which is mostly shadowed in this image, is about 1,200 metres (3,900 feet) high. The caldera floor spans 5 kilometres (3 miles).
According to the USGS Geographic Names Information System, Rear Admiral Richard E. Byrd discovered the volcano during a flight on 18 November 1934. He later named the mountain after Mabelle E. Sidley, the daughter of a contributor to the Byrd Antarctic Expedition.
View the full resolution image.