A torrent ran there—no doubt the superfluous waters of the lake escaping by this subglacial stream.
Superficial and subglacial melting greatly modify this result.
Less commonly they were subglacial, and failed to be covered, and less commonly still superglacial.
Where the subglacial streams did not follow subglacial valleys, they did not always find valleys when they issued from the ice.
It is not to be inferred, however, that the subglacial streams were altogether independent of the sub-ice topography.
subglacial till was under the pressure of the overlying ice.
Such drift would tend to increase the body of marginal stratified drift from subglacial sources.
There was one who followed the course of a subglacial stream, and thus made a veritable journey below the enormous vault of ice.
Before their issuance from beneath the ice, subglacial waters were not idle.
In this work the freezing and thawing of subglacial waters in any cracks and crevices of the rock no doubt play an important part.