overdeepening
overdeepening
[¦ō·vər′dēp·ə·niŋ] (geology)
The erosive process by which a glacier deepens and widens an inherited preglacial valley to below the level of the subglacial surface.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.