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.
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However, these occurrences could be biogenic, resulting from selective deposition of organic-rich detritus into glacial eroded valleys or overdeepening serving as subaqueous depocentres.
Seafloor pockmarks and gas seepages, northwestern Bay of Fundy, New Brunswick, Canada

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