5-517: Borg Massif is a mountain massif , about 50 km (30 mi) long and with summits above 2,700 metres (8,900 ft), situated along the northwest side of the Penck Trough in Queen Maud Land , East Antarctica . The tallest peak, at 2,727 metres (8,947 ft), is Hogsaetet Mountain . The parallel, ice-filled Raudberg Valley and Frostlendet Valley trend northeastward through
10-416: A tectonic plate and is considered the fourth-largest driving force in geomorphology . The word "massif" originates from French (in which the word also means "massive"), where it is used to refer to a large mountain mass or compact group of connected mountains forming an independent portion of a range. The Face on Mars is an example of an extraterrestrial massif. Massifs may also form underwater, as with
15-424: A massif is frequently used to denote the main mass of an individual mountain. As a purely scientific term in geology , however, a "massif" is separately and more specifically defined as a section of a planet's crust that is demarcated by faults or flexures . In the movement of the crust, a massif tends to retain its internal structure while being displaced as a whole. A massif is a smaller structural unit than
20-677: The massif, dividing its summits into three rough groups: The feature was photographed from the air by the Third German Antarctic Expedition (1938–1939), led by Captain Alfred Ritscher , but was not correctly shown on the maps by the expedition. It was mapped in detail by Norwegian cartographers from surveys and air photos by the Norwegian–British–Swedish Antarctic Expedition (1949–1952), led by John Schjelderup Giæver . It
25-567: Was remapped by air photos taken by the Sixth Norwegian Antarctic Expedition (1958–1959). They named it "Borgmassivet" (the castle massif) in association with Borg Mountain , its most prominent feature. Mountain massif A massif ( / m æ ˈ s iː f , ˈ m æ s ɪ f / ) is a principal mountain mass, such as a compact portion of a mountain range , containing one or more summits (e.g. France's Massif Central ). In mountaineering literature,
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