Ice-wedge Casts of Wisconsinan Age in Eastern Nebraska

• Main Author: Wayne, William J.
• Format: Text
• Language: unknown
• Published: DigitalCommons@University of Nebraska - Lincoln 1991
• Subjects: Sand wedges; Wind scour; Yardangs; Nebraska; Earth Sciences; Geomorphology; Glaciology; Paleobiology; Stratigraphy; Peoria; Ice; permafrost; wedge*; pergélisol
• Online Access: https://digitalcommons.unl.edu/geosciencefacpub/502; https://digitalcommons.unl.edu/context/geosciencefacpub/article/1512/viewcontent/Wayne_PPP_1991_Ice_wedge_casts__FINAL_MS.pdf

Sand-filled, wedge-shaped structures beneath a thin layer of aeolian sand penetrate a preIllinoian till and gravel in northeastern Nebraska. Interpreted to be relic thermal contraction crack wedges, they provide the first definite evidence in this State of the former presence of permafrost. The wedg...