南极南设得兰群岛利文斯顿岛 Miers Bluff组 (MBF)是一套岩层倒转、强烈变形、浅变质的浊流沉积地层 ,主要由砂岩、泥岩、粉砂岩及含砾砂岩组成 ,具有很好的韵律层 ,形成鲍玛序列 ,通常被认为属于近海底扇浊流沉积 ,并当作中新生代火山岩的基底。最近发现的孢粉化石指明其时代属晚三叠世 ,从而解决了久来时代的疑问(石炭—三叠纪 ,二叠—三叠纪 ,或前侏罗纪 )。分布在南极半岛格雷厄姆地的特里尼蒂半岛群、南奥克尼群岛的杂砂岩—页岩组、智利南部乔诺斯群岛乔诺斯变质杂岩的 Potranca组以及新西兰惠灵顿的 Torlesse杂岩应是时代相当、岩性及沉积环境相似的岩层。三叠纪末受太平洋板块俯冲影响 ,这一浊流地层褶皱、变形、隆升 ,具有相同的构造风格 ,是冈瓦纳古陆在侏罗纪早期开始裂解前夕一次构造事件的重要佐证 Antarctica South Shetland The Livingston Island Miers Bluff Formation (MBF) is a set of inverted, strongly deformed and supergenerated turbidite sedimentary formations consisting mainly of sandstone, mudstone, siltstone and pebbled sandstone with good The rhythm layer, forming the Bowman sequence, is generally considered to belong to the turbidity current of the bottom sea fan and serves as the base of Mesozoic-Cenozoic volcanic rocks. Recent discoveries of sporopollen fossils indicate that they belonged to Late Triassic, resolving questions of a long time (Carboniferous-Triassic, Permian-Triassic, or Pre-Jurassic). The Triton peninsula on the Graham Land in the Antarctic Peninsula, the Misoghon-Shale Formation in the South Orkney Archipelago, the Potranca Formation in the Chornosian metamorphic complex in the Peninsula of the North of Chile, and the Torlesse complex in Wellington, New Zealand Rock should be rock of similar age, lithology and sedimentary environment. At the end of the Triassic period, due to the subduction of the Pacific plate, this turbidite formation was folded, deformed, and uplifted with the same tectonic style, which is an important evidence of a tectonic event on the eve of the Gondwana paleosol initiation in the early Jurassic