preglacial

American  

[pree-glay-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

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Example Sentences

See Examples For:

preglacial

It is likely that in preglacial times the part of the valley north of Grassy Plain, if not the entire valley, drained northward into Still River, as now do Umpog Creek and Beaver Brook.

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

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 Ruth Sawyer-Harvey

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 Wallace W. Atwood

The largest eastern tributary, Beaver Brook, is in a preglacial valley now converted into a swamp the location and size of which are due entirely to a belt of limestone.

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

When preglacial valleys were filled by the drift in spots only, the postglacial streams followed them where they were not filled, only to leave them where the blocking occurred.

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

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