Mixed Diatom Assemblages in Pliocene to Recent Diamictons of the Central Ross Sea and the Siple Coast, West Antarctica

该奖项支持对南极罗斯海地区上新世至晚第四纪冰川沉积物中混合硅藻组合的研究，该地区被称为罗斯海Diamicton。这一层冰川沉积物是末次盛冰期冰川活动的记录，并保存着南极西部冰盖盛衰的信息。这项研究将利用从罗斯海和南极西部冰盖下的活塞和钻芯中回收的样本，并将使用现代定量方法来识别和解释硅藻种群。在这项研究中开发的数据将用于测试罗斯海海湾的地层模型。这些地层学模型将被用来评估南极西部冰盖的动态行为水平，特别是这个冰盖在最近的地质过去是否坍塌以及多久坍塌的问题。

This award supports a study of mixed diatom assemblages from Pliocene to late Quaternary glacial sediments in the Ross Sea region of Antarctica that are referred to as the Ross Sea Diamicton. This layer of glacial sediment is the record of glacial activity during the last glacial maximum and holds information about the waxing and waning of the West Antarctic Ice Sheet. This study will utilize samples that have been recovered in piston and drill cores from the Ross Sea and from beneath the West Antarctic Ice Sheet and will use modern quantitative methods for identifying and interpreting diatom populations. The data developed in this study will be used to test stratigraphic models for the Ross Sea Embayment. These stratigraphic models will be used to assess the level of dynamic behavior of the West Antarctic Ice Sheet, specifically the question of whether, and how often, this ice sheet has collapsed in the geologically recent past.