Late Wisconsin (Late Foxe) Glacial Extent in Pangnirtung Fjord-Cumberland Sound Area, Baffin Island, Canada

巴芬岛上的威斯康星州晚期冰的范围具有重要意义 冰盖重建的全球影响，海平面 气候变化和晚更新世的气候模拟。 的 这个项目的目的是测试两个假设，冰 1）从一个接地的Pangnirtung峡湾流下 在坎伯兰湾的地板上的位置，或2）流了起来， Pangnirtung峡湾从地面上的位置， 坎伯兰海峡。 在这两种情况下，冰都延伸到了 之前绘制的威斯康星州边缘图。 实地工作将侧重于详细的绘图和准确的 冰川磨蚀界限和沉积测量 功能. 特别是杜瓦尔冰碛将被绘制成地图 以确定最后一次冰川的方向和年龄 在该地区流动。 分析工作将涉及分析 土壤，包括角质蚀刻，以确定相对 年龄 从战略位置的湖泊沉积物核心将 以提供最低限度的放射性碳年龄 冰川侵蚀界限和沉积特征。 湖泊沉积物的花粉分析将用于 支持上述的测年技术。 最后， 将被重建，试图评估冰量 和动力学在Pangnirtung地区在晚 威斯康星州。

Late Wisconsin ice extent on Baffin Island has important global implications for ice sheet reconstruction, sea level change, and climate modeling of the late Pleistocene. The purpose of this project is to test two hypotheses that ice either: 1) flowed down Pangnirtung Fjord from a grounded position on the floor of Cumberland Sound, or 2) flowed up the Pangnirtung Fjord from a grounded position on the floor of the Cumberland Sound. In both scenarios, ice extended far beyond previously mapped late Wisconsin margins. Field work will focus on detailed mapping and accurate surveying of glacial abrasion limits and depositional features. In particular, the Duval moraines will be mapped in detail to determine the direction and age of the last ice flow in the area. Analytical work will involve analysis of soils, including hornblende etching, to determine relative ages. Sediment cores from strategically located lakes will be retrieved to provide minimum-limiting radiocarbon ages for glacial erosional limits and depositional features. Pollen analysis of lacustrine sediments will be used to support the above dating techniques. Finally, ice profiles will be reconstructed in an attempt to evaluate ice volume and dynamics in the Pangnirtung area during the late Wisconsin.