subglacialadj.

1820 W. Scoresby Acct. Arctic Regions I. 105 Pursuing their course through subglacial channels to the front of the iceberg.

1860 J. Tyndall Glaciers of Alps i. viii. 60 Strange subglacial noises were sometimes heard.

1939 E. D. Laborde tr. E. de Martonne Shorter Physical Geogr. (rev. ed.) xv. 228 Drumlins and æsars are regarded as sub-glacial deposits.

1977 National Geographic Aug. (caption) 201 Formed by a subglacial stream, an esker winds like a giant molehill across a farm near Kettle Moraine State Forest.

1993 Equinox Dec. 53/1 (caption) The Alberta ponds..were created either by subglacial erosion or by the displacement of debris by the last chunks of melting ice.

2006 Daily Tel. 20 Apr. 14/6 Sub-glacial lakes in Antarctica were first identified in the 1960s.

1873 Geol. Mag. 10 64 The fact is certain that there has been an enormous amount of rock disintegrated sub-glacially.

1978 Nature 8 June 456/2 Lava flows which were erupted subglacially in southwestern Iceland.

2006 Arctic, Antarctic, & Alpine Res. 38 164/2 Subglacially and supraglacially derived meltwaters circulate along the bed of both temperate and polythermal glaciers.