Geomorphology and sedimentology of the continental shelf adjacent to Mac. Robertson Land, East Antarctica: A scalped shelf
Geomorphology and sedimentology of the continental shelf adjacent to Mac. Robertson Land, East Antarctica: A scalped shelf
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Mac 附近大陆架的地貌和沉积学。
DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
P. O'Brien
中科院分区：
文献类型：
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作者：
P. Harris;P. O'Brien
在第四季，Mac。南极洲东部罗伯逊陆棚被冰川和海流侵蚀，露出底层基底，形成剥壳陆棚。主要地貌带为：（1）高起伏、山脊和山谷地形（200-1400米）;（2）与低能量、沉积陆棚山谷和盆地有关的平滑海底（400-800米）;（3）低起伏、平坦岸顶（100-200米）;（4）冰山凿出和水流改造的近岸边缘和上斜坡（200至< 630米）。约90%的大陆架表面为净侵蚀，约10%为净沉积。沉积过程和沉积物可能是南极东部边缘大片地区所共有的。
During the Quaternary, the Mac. Robertson shelf of East Antarctica was deeply eroded by glaciers and currents exposing the underlying basement, resulting in a scalped shelf. Major geomorphic zones are: (1) high-relief, ridge and valley topography (200–1400 m); (2) smooth sea floors associated with low-energy, depositional shelf valleys and basins (400–800 m); (3) low-relief, planated banktops (100–200 m); and (4) iceberg gouged and current reworked seaward-bank margins and upper slope (200 to < 630 m). About 90% of the shelf's surface has net erosional conditions and about 10% is net depositional. The sedimentary processes and deposits may be common to large areas of the East Antarctic margin.