Origin of the 610 th Avenue Moraine of the Des Moines Lobe, Story County, Iowa

• Main Author: Ankerstjerne, Suzanne Marie
• Format: Text
• Language: English
• Published: Iowa State University Digital Repository 2010
• Subjects: anisotropy of magnetic susceptibility; crevasse; Des Moines Lobe; moraine; washboard; Earth Sciences; Moraine Ridge; Ice Sheet
• Online Access: https://lib.dr.iastate.edu/etd/11893; https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=2857&context=etd

The late-glacial (<∼>15 kyr B.P.) advance of the soft-bedded Des Moines Lobe, the marginal portion of an ice stream of the Laurentide Ice Sheet, deposited regularly-spaced, transverse moraines. These so-called washboard moraines have relief of 1-5 m, an average spacing of <∼>105 m, and a...