The massive ice (Fig. 64.2C) comprises both buried basal ice and intrasedimental ice (Murton et al., 2005). Burial of basal ice in this region occurred by three processes:
1 glacial thrusting and shearing of frozen sediment (inferred where frozen glaciotectonite overlies basal ice);
2 downward melt of ice previously exposed at the ground surface (inferred where supraglacial melt-out till overlies basal ice);
3 deposition of aeolian, glaciofluvial or lacustrine sediments above basal ice.
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