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Nordenskjöld Basin
Nordenskjöld Basin is an undersea basin named in association with the Nordenskjöld Ice Tongue (itself after explorer Otto Nordenskjöld Nils Otto Gustaf Nordenskjöld (6 December 1869 – 2 June 1928) was a Swedish geologist, geographer, and polar explorer. Early life Nordenskjöld was born in Hässleby in Småland in eastern Sweden, in a family that included his maternal unc ...). Name approved 4/80 (ACUF 201). References Oceanic basins of the Southern Ocean {{marine-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Southern Ocean
The Southern Ocean, also known as the Antarctic Ocean, comprises the southernmost waters of the world ocean, generally taken to be south of 60th parallel south, 60° S latitude and encircling Antarctica. With a size of , it is the second-smallest of the five principal oceanic divisions, smaller than the Pacific Ocean, Pacific, Atlantic Ocean, Atlantic and Indian Ocean, Indian oceans, and larger than the Arctic Ocean. The maximum depth of the Southern Ocean, using the definition that it lies south of 60th parallel, was surveyed by the Five Deeps Expedition in early February 2019. The expedition's multibeam sonar team identified the deepest point at 60° 28' 46"S, 025° 32' 32"W, with a depth of . The expedition leader and chief submersible pilot Victor Vescovo, has proposed naming this deepest point the "Factorian Deep", based on the name of the crewed submersible ''DSV Limiting Factor'', in which he successfully visited the bottom for the first time on February 3, 2019 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Depression (geology)
In geology, a depression is a landform sunken or depressed below the surrounding area. Depressions form by various mechanisms. Types Erosion-related: * Blowout (geomorphology), Blowout: a depression created by Aeolian processes, wind erosion typically in either a partially vegetated Dune, sand dune ecosystem or dry soils (such as a post-glacial loess environment). * Glacial valley: a depression carved by erosion by a glacier. * River valley: a depression carved by fluvial erosion by a river. * Area of subsidence caused by the collapse of an underlying structure, such as sinkholes in karst terrain. * Sink (geography), Sink: an endorheic depression generally containing a wikt:persistent, persistent or intermittent (seasonal) lake, a Salt pan (geology), salt flat (playa) or dry lake, or an ephemeral lake. * Panhole: a shallow depression or basin eroded into flat or gently sloping, cohesive rock.Twidale, C.R., and Bourne, J.A., 2018Rock basins (gnammas) revisited.''Géomorphologie: ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nordenskjöld Ice Tongue
The Mawson Glacier () is a large glacier on the east coast of Victoria Land, Antarctica, descending eastward from the Antarctic Plateau to the north of Trinity Nunatak and the Kirkwood Range, to enter the Ross Sea, where it forms the Nordenskjöld Ice Tongue. The glacier was first mapped by the British Antarctic Expedition (1907–09) and named for Douglas Mawson, the expedition physicist, who later led two other Antarctic expeditions, 1911–14, and 1929–31. Glaciology After the Last Glacial Maximum (LGM) there was dynamic retreat of the ice sheet covering the Ross Sea in the Mawson Glacier region. The glacier thinned abruptly between 7,500 and 4,500 years ago, then thinned more gradually until recently. This thinning was very similar to what happened at the Mackay Glacier to the south. Probably the ice sheet retreat and glacial ice drawdown were caused by ocean warming. Course The Mawson Glacier rises on the Antarctic Plateau. Features of the region of its head include B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Otto Nordenskjöld
Nils Otto Gustaf Nordenskjöld (6 December 1869 – 2 June 1928) was a Swedish geologist, geographer, and polar explorer. Early life Nordenskjöld was born in Hässleby in Småland in eastern Sweden, in a family that included his maternal uncle, the polar explorer Adolf Erik Nordenskiöld, and cousin Gustaf Nordenskiöld. His father and mother were cousins, but his father's family name was "Nordenskjöld", while his mother's family name was spelled "Nordenskiöld". He studied at Uppsala University, obtaining a doctorate in geology in 1894, and later became a lecturer and then associate professor in the university's geology department. Career Otto Nordenskjöld led mineralogical expeditions to Patagonia in the 1890s, and to Alaska and the Klondike area in 1898. Antarctic Expedition Nordenskjöld led the 1901–1904 Swedish Antarctic Expedition. Their ship ''Antarctic'', commanded by the seasoned Antarctic sailor Carl Anton Larsen, visited Buenos Aires and the Falkla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
