preglacial

American  

[pree-gley-shuhl] / priˈgleɪ ʃəl /

adjective

Geology.

1. prior to a given glacial epoch, especially the Pleistocene.

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preglacial British  

/ priːˈɡleɪsɪəl /

adjective

1. formed or occurring before a glacial period, esp before the Pleistocene epoch

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Etymology

Origin of preglacial

First recorded in 1850–55; pre- + glacial

Example Sentences

This fact explains, in part, why the glacier had little difficulty in altering the preglacial drainage, and how the change so effected became permanent.

From Drainage Modifications and Glaciation in the Danbury Region Connecticut State of Connecticut State Geological and Natural History Survey Bulletin No. 30 by Sawyer-Harvey, Ruth

In preglacial times the watershed of the Mississippi and of the great rivers east of the Alleghany Mountains, the Susquehanna and Hudson, extended probably farther north than it does to-day.

From Nature's Miracles, Volume 1 Familiar Talks on Science—World-Building and Life. Earth, Air and Water. by Gray, Elisha

Nevertheless it is probable that the valley was no deeper in preglacial time than it is now.

From Drainage Modifications and Glaciation in the Danbury Region Connecticut State of Connecticut State Geological and Natural History Survey Bulletin No. 30 by Sawyer-Harvey, Ruth

Followed southward, this valley though blocked by the moraine a half mile below the lake, leads off towards the Wisconsin river, and is probably the course of a large preglacial stream.

From The Geography of the Region about Devils Lake and the Dalles of the Wisconsin by Atwood, Wallace W.

After the ice had melted, the mantle of drift which it left was sometimes so disposed as to completely obliterate preglacial valleys.

From The Geography of the Region about Devils Lake and the Dalles of the Wisconsin by Atwood, Wallace W.