纽约州上萨斯奎哈纳谷的冰坝湖和劳伦蒂德里德旺斯的证据

IF 0.4 Q4 GEOSCIENCES, MULTIDISCIPLINARY
P. Fleisher
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引用次数: 0

摘要

地形和测井记录了纽约州中部劳伦泰德冰盖从阿巴拉契亚高原撤退期间,萨斯奎哈纳河谷上游的一个冰接触和前冰川湖泊系统。消退的冰碛形成了所有湖泊的水坝,除了一个新发现的“祖先固特异湖”保留在Colliersville的一个短暂的冰坝后面。一个突出的死冰水槽目前占据了坝址的谷底,古固特异湖保持了一个稳定的1360英尺的湖泊水位,这体现在固特异湖上方山谷壁上水井原木上的厚湖沉积物上。1250英尺高的三角洲露台位于同一区域,标志着第二个较低的湖滨线。此外,邻近的波特兰维尔冰碛上的水井记录中含有由冰接触物质沉积物上下结合的湖泊沉积物,从而证明了劳伦泰德的前进,随后阻塞了山谷,形成了米尔福德冰川湖,作为萨斯克汉纳湖系统的一部分。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Evidence of An Ice-Dammed Lake and Laurentide Readvance Upper Susquehanna Valley, New York State
Landforms and well logs document a system of ice-contact and proglacial lakes in the upper Susquehanna valley during Laurentide Ice Sheet retreat from the Appalachian Plateau, central New York State.  Recessional moraines formed dams for all lakes, except a newly revealed “Ancestral Goodyear Lake” retained behind an ephemeral ice dam stranded at Colliersville.  A prominent dead-ice sink currently occupies the valley floor at the dam site Ancestral Goodyear Lake held a stable lake level at 1360 feet as represented by thick lake sediments perched in water well logs on the valley wall above Goodyear Lake.  A deltaic terrace at 1250 feet in the same vicinity marks a second, lower lake strand.   In addition, water well logs on the adjacent Portlandville Moraine contain lake sediments bound above and below by ice-contact material deposits thus demonstrating a Laurentide readvance that subsequently dammed the valley to form Glacial Lake Milford as part of the Susquehanna Lake System.
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来源期刊
Journal of Geology Geography and Geoecology
Journal of Geology Geography and Geoecology GEOSCIENCES, MULTIDISCIPLINARY-
自引率
40.00%
发文量
57
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