Living reference work entry
Streamlined hill, typically ovoid to elongate, in previously ice sheet/glacier affected terrains.
A type of subglacial streamlined hill.
A streamlined hill that occurs mostly in glacial sediments (Menzies 1979; Clark et al. 2009; Shaw 2002; Stokes et al. 2011). They are ubiquitous on the now-exposed beds of former ice sheets, where they form fields or “flow-sets” that contain hundreds to thousands of individual drumlins with their long axis orientated parallel to the former ice flow direction (Boulton and Clark 1990; Fig. 1). Geophysical techniques have also detected their presence and formation beneath extant ice sheets, e.g., in Antarctica (King et al. 2007; Smith et al. 2007), and they have also been seen to emerge from receding glacier margins (Johnson et al. 2010).
KeywordsElongation Ratio Pressure Melting Glacier Margin Glaciofluvial Sand Pressure Melting Point
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