Geologic Test for Extent of Wisconsinian Glaciation on Southern Baffin Island, Arctic Canada, from Exposure Ages Determined by Radionuclides 26A1 and 10Be

该奖项是为了支持一个项目，该项目通过确定抛光和条纹基岩表面和冰川巨石的宇宙形成暴露年龄，来完善巴芬岛南部的冰川年代学。为了估计冰川消融的时间，石英中的铍-10和铝-26分离于：1)山谷底部和峡湾侧壁上抛光和条纹的基岩表面，以及2)嵌套的冰碛石上的巨石。初步结果表明，巴芬岛南部Pangnirtung地区的冰川消融发生在大约7500年前。这项工作将提供信息，以帮助解决第四纪科学中长期存在的争议，该争议涉及威斯康辛州晚期加拿大东部北极冰盖的范围。＊＊＊

9321733 Davis This award is for support for a project to refine the glacial chronology on southern Baffin Island by determining cosmogenic exposure ages of polished and striated bedrock surfaces and morainal boulders. In order to estimate the timing of deglaciation, the Beryllium-10 and Aluminum-26 in quartz separates from: 1) polished and striated bedrock surfaces on valley bottoms and along fjord sidewalls, and 2) boulders on nested sets of moraines will be measured. Preliminary results suggest that deglaciation in the Pangnirtung area of southern Baffin Island occurred around 7,500 years ago. This work will provide information to help resolve a long-standing controversy in Quaternary science involving the extent of ice sheets in the eastern Canadian Arctic during the late Wisconsinan. ***