REU Site: Analysis of Glacial Sediments, Minnesota and Brazil: Evidence of Paleo-ice Stream Dynamics

UMM REU项目的目标是为两种截然不同的古冰流建立时间约束模型。REU的参与者将研究巴西晚古生代副<e:1>叶和明尼苏达州晚更新世得梅因叶的冰川沉积物。地貌的详细制图、沉积物分析和冰下河床的分析将使人们对冰流的运动和快速流动的原因有更深入的了解。冰流在冰原质量平衡中的作用是至关重要的（南极冰原大约90%的排放是由冰流产生的），但还有很多是未知的。本研究将集中在：气候对冰流运动的影响，海洋相互作用和冰盖接地的意义，以及冰流流动的性质（滑动与变形）。独特的是，参与者有机会在两个非常不同的地质背景下研究冰流：在明尼苏达州，他们将研究地表地质学和未固结的砂和砾石，而在巴西，他们将研究地层学和沉积岩。UMM REU项目还将在两个夏天的时间里，在国际环境和女性和印第安人占多数的环境中培养16名美洲原住民女性地质学专业的学生。美国土著女性在地球科学领域的代表性非常低。UMM REU项目有专门设计的组成部分，通过提供同伴支持、培养参与者信心和向参与者介绍支持性的角色模型来纠正这种情况。UMM REU的学生将参加该计划的一个研讨会，在那里他们将研究“像地质学家一样思考”的途径，科学伦理问题，与职业女性地球科学家会面，并开始规划未来的学术和科学事业。参加者将进行专业讲座及实地考察。这个项目将建立信心，并帮助这些美国土著妇女作为科学家和个人成熟起来。这个REU站点由国际和综合活动办公室和地球科学司共同资助。

The goal of the UMM REU program is to develop time-constrained models for two very different proposed paleo-ice streams. REU participants will study glacial deposits of the Late Paleozoic Paraná lobe of Brazil and Late Pleistocene age Des Moines lobe of Minnesota. Detailed mapping of landforms, sediment analysis and the analysis of subglacial bedforms will provide a greater understanding of the movement and the causes of rapid ice stream flow. The role of ice streams in the mass balance of ice sheets is of critical importance (approximately 90% of all discharge of the Antarctic ice sheet is by ice streams), yet a great deal is unknown. This research will focus on: the influence of climate on ice stream movement, the significance of marine interaction and ice sheet grounding, and the nature of ice stream flow (sliding vs. deformation). Uniquely, participants have an opportunity to research ice streams in two very different geologic contexts: in Minnesota they will study surficial geology and unconsolidated sands and gravels while in Brazil they will study stratigraphy and sedimentary rocks. The UMM REU program will also nurture the development of 16 Native American women geology majors over two summers in both an international setting and in an environment where women and Native Americans are in the majority. Native American women are extremely underrepresented in the Geosciences. The UMM REU program has components designed specifically to remedy this situation by providing peer support, developing participant confidence and introducing participants to supportive role models. UMM REU students will participate in a seminar component of the program where they will examine pathways to "thinking like a geologist," issues in scientific ethics, meet professional women geoscientists, and begin planning future academic and scientific careers. Participants will give a professional talk and lead a field trip. This program will build confidence and aid in the maturation of these Native American women as scientists and individuals. This REU site is co-funded by the Office of International and Integrated Activities and the Division of Earth Sciences.