Glacifluvial processes and landforms

Because meltwater is commonly routed along the frozen lateral margins of subpolar glaciers, lateral meltwater channels eroded into bedrock or sediment during this drainage are common (Fig. 19.2). The nested patterns of such channels document successive recessional positions of glacier snouts confined by topography (Dyke, 1993; Ô Cofaigh et al., 1999). Although subglacial melt-water has been reported from subpolar glaciers in the region, eskers are rare. This probably reflects the restricted nature of subglacial drainage and the sparsity of debris available for meltwater transport. Because large volumes of meltwater are directed along frozen glacier margins, sediment carried by such flows can be deposited as kame terraces or deltas.

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