The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.
a step formed by the convergence of transverse scarps on the floor of a glaciated valley at the point of the previous confluence of two glaciers, where the thickness of the glacier and its erosion capacity increased sharply.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.