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.
References in periodicals archive ?
However, these occurrences could be biogenic, resulting from selective deposition of organic-rich detritus into glacial eroded valleys or overdeepening serving as subaqueous depocentres.