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首页> 外文期刊>Journal of Paleolimnology >The Stanley unconformity in Lake Huron basin: evidence for a climate-driven closed lowstand about 7900 14C BP, with similar implications for the Chippewa lowstand in Lake Michigan basin
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The Stanley unconformity in Lake Huron basin: evidence for a climate-driven closed lowstand about 7900 14C BP, with similar implications for the Chippewa lowstand in Lake Michigan basin

机译:休伦湖盆地的斯坦利不整合面:证据表明气候驱动的封闭低位约7900 14 C BP,与密歇根湖盆地奇珀瓦低位相似

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摘要

J.L. Hough in 1962 recognized an erosional unconformity in the upper section of early postglacial lake sediments in northwestern Lake Huron. Low-level Lake Stanley was defined at 70 m below present water surface on the basis of this observation, and was inferred to follow the Main Algonquin highstand and Post-Algonquin lake phases about 10 14C ka, a seminal contribution to the understanding of Great Lakes history. Lake Stanley was thought to have overflowed from the Huron basin through the Georgian Bay basin and the glacio-isostatically depressed North Bay outlet to Ottawa and St. Lawrence rivers. For this overflow to have occurred, Hough assumed that post-Algonquin glacial rebound was delayed until after the Lake Stanley phase.
机译:霍夫(J.L. Hough)于1962年认识到休伦湖西北部早期冰川后湖泊沉积物的上部存在侵蚀不整合。根据这一观察,将低水位的斯坦利湖定义为当前水面以下70 m,并推断其遵循的​​主要Algonquin高水位相和后Algonquin湖相约为10 14 C ka,这对对大湖区历史的了解。人们认为,斯坦利湖已经从休伦盆地溢出,流经乔治亚湾流域,以及北冰洋的冰川等静压出口流向渥太华河和圣劳伦斯河。对于这种溢出的发生,霍夫认为阿冈昆后的冰川回弹被推迟到斯坦利湖阶段之后。

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