El Paramo Transgressive Gravel Spit, Tierra del Fuego, Argentina
El Paramo Transgressive Gravel Spit, Tierra del Fuego, Argentina
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埃尔帕拉莫海侵砾石沙嘴，火地岛，阿根廷
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
G. Bonorino
中科院分区：
文献类型：
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作者：
G. G. Bujalesky;G. Bonorino
火地岛的东北大西洋海岸位于该岛的安第斯山脉以外的低地。这一海岸经历了大潮汐制度、中等能量波和强烈的西风。广阔的海滩和其他滨海沉积由砾石和粗沙组成。该地区自1.8 Ma B.P.以来一直没有冰。在更新世海平面高位期间，冰川沉积被滨海过程重新加工形成海滩。埃尔帕拉莫半岛(El Paro Spit)是一个20公里长的砾石吐痰屏障，部分关闭了圣塞巴斯蒂安海湾。它是在过去的6000年里形成的。沙坑的生长是在有限的沉积物供应下进行的。它的拉长是侵蚀和沉积物循环的结果，导致了向陆地的后退。
The northeastern Atlantic coast of Tierra del Fuego is located in the extra-Andean lowlands of the island. This coast experiences a macrotidal regime, moderate energy waves and intense westerly winds. Extensive beaches and other littoral deposits are composed of gravel and coarse sand. This area has been free of ice since 1.8 Ma B.P. Glacigenic deposits were re-worked by littoral processes that formed beaches during sea level highstands of the Pleistocene. Peninsula El Paramo (El Paramo spit) is a 20 km-long gravel spit barrier that closes partially the San Sebastian Bay. It has formed during the last 6,000 years. The growth of the spit has taken place under limited sediment supply. Its elongation is the result of erosion and sediment recycling, resulting in a landward retreat.