On the Erratic Tertiaries bordering the Penine Chain. Part II.
On the Erratic Tertiaries bordering the Penine Chain. Part II.
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DOI：
10.1144/gsl.jgs.1853.009.01-02.54
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发表时间：
1853-02
期刊：
影响因子：
--
通讯作者：
J. Trimmer
中科院分区：
文献类型：
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作者：
J. Trimmer
本文将要描述的事实是为了说明我在以前的通讯中作为一般的哲学名词所提到的两点；也就是说，随着从海岸向内陆的延伸，较低地层的砾质粘土所上升的高度也在增加；在“不稳定的”海洋下面的区域里，出现了相当大的区域，那里的沉积物被广泛地移走了，它们以前的存在只是偶然的小的例外，很容易被忽视。在一篇关于从康格尔顿到曼彻斯特的奔宁链附近的不稳定第三纪的论文中，我描述了在康格尔顿和麦克尔斯菲尔德附近，上层不稳定第三纪的沙子与卵石粘土的叠加，以及两者在奥尔德利边缘的某一高度上的停止，然而，在那里，它们以前的存在是由偶尔在其顶部的一块搬运岩石证明的。在奔宁链的陡峭侧面，两者都以同样的方式停止，那里的沙土可能被认为完全来自于下面的煤系沙砾，如果几颗飘忽不定的鹅卵石不能证明组成它的一些较小的颗粒和较粗的碎片一定是被搬运的。然而，在萨顿教堂所在的山脊方向，有一个山谷延伸了大约两英里，这个山谷充满了砾石粘土，在那里
The facts which will be described in this paper are adduced in illustration of two points to which I have adverted in former communications as general phænomena; namely, that the elevation, to which the boulder-clay of the Lower Erratics ascends, increases as it is traced from the coast into the interior; and that within areas which have been beneath the “erratic” sea considerable tracts occur from which its deposits have been so extensively removed, that their former existence is only proved by occasional small outliers, which may be easily overlooked. In a paper on the Erratic Tertiaries bordering the Penine Chain from Congleton to Manchester, I have described the superposition of the sand of the upper erratics to the boulder-clay, in the neighbourhood of Congleton and Macclesfield, as well as the cessation of both at a certain height on Alderley Edge, where, however, their former presence is attested by an occasional boulder of transported rock on its summit. Both cease in the same manner on the steep flanks of the Penine Chain, where the sandy soil might be supposed to be derived wholly from the subjacent grits of the Coal-measures, if a few erratic pebbles did not prove that some of the smaller particles of which it is composed must have been transported, as well as the coarser fragments. A valley, however, runs for about two miles into the chain in the direction of the ridge on which Sutton Church stands, and this valley is filled with boulder-clay, which at