Notes on the geology of the area between the heads of the Beardmore and Shackleton glaciers, Antarctica
Notes on the geology of the area between the heads of the Beardmore and Shackleton glaciers, Antarctica
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关于南极洲比尔德莫尔冰川和沙克尔顿冰川顶端之间地区的地质笔记
DOI：
10.1080/00288306.1965.10428111
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发表时间：
1965
影响因子：
2.2
通讯作者：
V. R. Mcgregor
中科院分区：
文献类型：
--
作者：
V. R. Mcgregor
摘要本文介绍了米尔冰川和凯尔蒂冰川附近Beacon群上部的四个地层柱。被研究的最古老的地层，巴克利煤系，包含了良好的Glossopteris植物群。上复法拉组中发育良好的旋回被认为反映了酸性条件下河流的沉积，这些河流的路线转移到了缓慢下沉的洪泛平原上。Falla组被Dominion煤系覆盖，描述了其类型剖面。在磨坊冰川顶部一块不稳定的巨石中发现的中、上三叠统植物可能来自Dominion煤系。这些Beacon群的建造被Kirkpatrick玄武岩的拉斑玄武岩覆盖，并被同岩浆的Ferrar辉绿岩侵入。简要讨论了玄武岩中的次生矿物，包括沸石的赋存状态。一个紧凑的冰川含有辉绿岩巨石，它露出在极地高原的边缘在沙克尔顿冰川的顶部，...
Abstract Four stratigraphic columns from the upper part of the Beacon Group near the Mill and Keltie Glaciers are presented. The oldest formation examined, the Buckley Coal Measures, contains a good Glossopteris flora. Well developed cyclothems in the overlying Falla Formation are considered to reflect deposition under acid conditions by rivers whose courses shifted over a slowly subsiding flood plain. The Falla Formation is overlain by the Dominion Coal Measures, whose type section is described. Middle or Upper Triassic plants found in an erratic boulder at the head of the Mill Glacier may have come from the Dominion Coal Measures. These formations of the Beacon Group are overlain by tholeiitic flood basalts of the Kirkpatrick Basalt and are intruded by comagmatic Ferrar Dolerite. The occurrence of secondary minerals, including zeolites, in the basalts is briefly discussed. A compact till containing dolerite boulders, which crops out on the edge of the Polar Plateau at the head of the Shackleton Glacier,...