Ice margins simply don't get sharper than this one south of Chelan, Washington. The southwesternmost corner of the Laurentide Ice Sheet spread south from Canada and stopped here. A belt of hilly terrain dotted with huge black basalt boulders has a razor-sharp boundary with smooth hills to the west (left) that were not glaciated and were covered with wind-deposited soil called loess.
Location 47o 50' 00" N, 119o 52' 14" W. The individual boulders are visible on Google Earth.
Created 05 February 2008, Last Update 25 May 2011
Not an official UW Green Bay site