PLEISTOCENE GLACIATION QF TASMANIA: REVIEW AND SPECULATIONS
PLEISTOCENE GLACIATION QF TASMANIA: REVIEW AND SPECULATIONS
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塔斯马尼亚更新世冰川期：回顾与推测
DOI：
10.1111/j.1467-8470.1972.tb00130.x
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发表时间：
1972
期刊：
影响因子：
--
通讯作者：
E. Derbyshire
中科院分区：
文献类型：
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作者：
E. Derbyshire
更新世冰川是塔斯马尼亚地质文献中一个次要但反复出现的主题，始于从德文特河上游河谷的先驱边缘向西探索的旅程。查尔斯·古尔德似乎是第一个认识到这些迹象的人，但他没有发表这些实地观察的细节。然而，他令人愉快的叙述“探索西部国家”（1860）确实包含了对花岗岩巨石（在巴恩布拉夫南坡的一条小河中）的提及，这是非常模糊的。古尔德的叙述统计称，他在“埃尔登悬崖南侧的小河谷”的片岩基岩上发现了花岗岩巨石。 7 hc 文字叙述和随附的地图可以确定这是一个印刷错误，并且应该读作“巴恩布拉夫的南侧”。考虑到续集中西海岸和摇篮 - 巴恩布拉夫 icc 合并杜里尔的可能性，这里的露头以东存在花岗岩飘忽不定的现象很有趣？ g 较老的或较年轻的冰川的最大冰期（比较 Moore，1883）。这些早期报告包含对塔斯马尼亚一些最困难地区的不稳定巨石的描述：它们仍然是河流分水岭和默奇森-麦金托什交汇处之间唯一可用的详细证据。在罗穆卢斯山西北的麦金托什河上，斯普伦特（Sprent，I 887）将河床描述为“充满了巨大的圆形花岗岩巨石，尽管我无法确定附近是否有任何花岗岩巨石”。悬崖是砂岩的……’。他将这些巨石归因于从摇篮高原下降的冰川冰（可能是通过穿过部分泥盆纪花岗岩露头的弗瑞河）。约翰斯顿 (Johnston, 1888, 1894) 强调默奇森和麦金托什流域的冰川化，蒙哥马利 (Montgomery, I 894) 和摩尔 (Moore, 1 894) 依据相同的理由，分别使用地质和地貌标准；例如，“在这个地区，山丘的轮廓是整个宽阔、平坦的斜坡，而不是我们期望在仅由流水雕刻的片岩和石英岩国家中发现的尖锐、锯齿状、破碎的轮廓”(Montgomery, 1894, 164)。正是在这个时候，琳达谷（靠近皇后镇）的松树碎片首次被描述（蒙哥马利，1891）并
PLEISTOCENE GLACIATION is a minor but recurring theme in the literature of Tasmanian geology, starting with the journeys of exploration westward from the pioneer fringe of the upper Derwent River valley. Charles Gould appears to have been the first to recognize the signs but no details of these field observations were published by him. His delightful narrative ‘Exploration of the western country’(1 860), however, does contain reference to granite boulders (in a small river on the south slopes of Barn Bluff) which is tantalisingly vague. Gould’s narrative statcs that he found granite boulders on schist bedrock in the ‘Valley of the small river draining the south side of the Eldon Bluff’. 7 hc textual narrative and the accompanying map make it certain that this is a mis-print and that this should read ‘fhe south side of Barn Bluff’. The presence here of granite erratics to the east of ‘their outcrop is interesting in view of the possibility raised in the sequel that the West Coast and Cradle-Barn Bluff icc merged durir? g the glacial maximum of either the older or the younger glaciation (compare Moore, 1883).These early reports contain descriptions of erratic boulders in some of the most difficult country in Tasmania: they are still the only detailed cvidence available between the rnain watershed and the Murchison-Mackintosh confluence. On the Mackintosh River, northwest of Mt. Romulus, Sprent (I 887) described the river bed as ‘full of immense rounded boulders of granite, although I could not ascertain that any occurs in situ thereabouts. The cliffs are of sandstone...’. He ascribed the boulders to glacial ice descending from the Cradle plateau (prcsumably via the Fury River which crosses part of the Devonian granite outcrop). Glacierization of the Murchison and Mackintosh catchments was stressed by Johnston (1888, 1894), largely on the same grounds and independently by Montgomery (I 894) and Moore (1 894) using both geological and geomorphological criteria; for example,‘Throughout this district the contours of the hills are on the whole wide, broad, and flat slopes, not the sharp, jagged, broken outlines which we should expect to find in schist and quartzite country carved only by running water’(Montgomery, 1894, 164). It was at this time that the pine fragments in the drift of the Linda Valley (near Queenstown) were first described (Montgomery, 1891) and