image: Steep bedrock hills and bluffs lining the upper Mississippi River valley record its (geologically) recent incision, within the past 2.5 million years. (From Perrot State Park, WI, looking towards the Minnesota side of the Mississippi.) This material relates to a paper that appeared in the Jan. 30th, 2019, issue of Science Advances, published by AAAS. The paper, by A.D. Wickert at University of Minnesota in Minneapolis, MN, and colleagues was titled, "The Mississippi River records glacial-isostatic deformation of North America." view more
Credit: [Credit: A. Wickert]