Stratigraphy, Sedimentology and Paleoceanogaphy of the Late Glacial and Holocene Gulf of Maine: A Model for a TemperateIce Shelf or a Calving Bay

晚冰期和全新世缅因湾的地层学、沉积学和古海洋学：温带冰架或崩解湾的模型

• 批准号: 8911533
• 负责人: Detmar Schnitker
• 金额: $ 15.49万
• 依托单位: University of Maine
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-04-01 至 1992-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8911533&HistoricalAwards=false
• 关键词: Stratigraphy; Sedimentology; Paleoceanogaphy; Late; Glacial

The almost enclosed Gulf of Maine was filled with continental ice at the height of the last glaciation and has gradually evolved into the biologically productive body of water of today. Preliminary data suggest that the disappearance of glacial ice from the Gulf of Maine followed a different path than is known from modern glaciers which enter the sea. It formed a topographically buttressed ice shelf, in contact with relatively warm water, producing much glacial-marine sediment. High- resolution seismic profiling and examination of piston cores will test this hypothesis, AMS radiocarbon dates will test indications that an unusually early (18 ka) marine invasion of the Gulf of Maine took place. This research will provide a detailed description of the genesis, stratigraphy and composition of a type of geological strata which may be very common in the geological record.

几乎封闭的缅因湾在最后一次冰期的高峰时期充满了大陆冰，并逐渐演变成今天具有生物生产力的水体。初步数据表明，缅因湾冰川的消失与现代入海冰川的消失路径不同。它形成了一个地形上支撑的冰架，与相对温暖的海水接触，产生了大量的冰川-海洋沉积物。高分辨率地震剖面和活塞岩心的检查将验证这一假设，AMS放射性碳测年将验证缅因州海湾发生异常早（18ka）海洋入侵的迹象。这项研究将详细描述地质记录中可能非常常见的一类地质地层的成因、地层和组成。