Landform Evolution in the Dry Valleys and its implications for Miocene-Pliocene Climate Change in Antarctica

这个项目试图回答一个简单的问题：在南极洲麦克默多干谷高地发现的坑洞和相关地貌特征有多古老？一些研究表明，它们的年龄超过1000万年，并且可以追溯到南极洲东部冰盖的生长，世界？s最大的。然而，一些证据表明，这些是年轻的侵蚀特征，一直持续到今天。该项目使用宇宙成因核素测年来确定坑洞地板的年龄。这些结果对于确定冰盖的位置很重要。的历史和解释的O-同位素记录的海洋沉积物的核心，全球气候的关键记录。更广泛的影响包括K12推广和将成果纳入大学课程。

This project seeks to answer a simple question: how old are potholes and related geomorphic features found in the uplands of the McMurdo Dry Valleys, Antarctica? Some research suggests that they are over ten million years old and date the growth of the East Antarctic Ice Sheet, the world?s largest. However, some evidence suggests that these are young, erosional features that continuing to evolve to this day. This project uses cosmogenic nuclide dating to determine the age of the pothole floors. The results are important for determining the ice sheet?s history and interpreting the O-isotope record from the marine sediment cores, key records of global climate. Broader impacts include K12 outreach and incorporation of outcomes into university courses.