Subglacial

Subglacial
Refers to the region near the base of a glacier where sediment-rich ice occurs, meltwater may be under pressure, and rocks are crushed and ground.

SUPERFICIAL DEPOSITS: Surface sediments that rest on bedrock. Where they are more than two metres thick, they are shown on geological maps. These deposits were formed during the Quaternary Period (seealso Pleistocene and Holocene) which started 2.6 million years ago.