subglacial

[ suhb-gley-shuh l ]

/ sʌbˈgleɪ ʃəl /

beneath a glacier: a subglacial stream.

formerly beneath a glacier: a subglacial deposit.

Origin of subglacial

First recorded in 1810–20; sub- + glacial

sub·gla·cial·ly, adverb

Where the subglacial streams did not follow subglacial valleys, they did not always find valleys when they issued from the ice.

The Geography of the Region about Devils Lake and the Dalles of the Wisconsin |Rollin D. Salisbury
Before their issuance from beneath the ice, subglacial waters were not idle.

The Geography of the Region about Devils Lake and the Dalles of the Wisconsin |Rollin D. Salisbury
In this work the freezing and thawing of subglacial waters in any cracks and crevices of the rock no doubt play an important part.

The Elements of Geology |William Harmon Norton
Such drift would tend to increase the body of marginal stratified drift from subglacial sources.

The Geography of the Region about Devils Lake and the Dalles of the Wisconsin |Rollin D. Salisbury

Superficial and subglacial melting greatly modify this result.

The Glaciers of the Alps |John Tyndall

subglacial

/ (sʌbˈɡleɪsɪəl) /

formed or occurring at the bottom of a glacier

subglacially, adverb