A mass of rocks and sediment carried down and deposited by a glacier, typically as ridges at its edges or extremity.‘It is also likely that mass movement is much more common during periods when glaciers are retreating; large moraines and steep valley sides are then unstable because they are no longer supported by the glacier.’
- ‘A moraine is the ground up debris consisting of everything from giant boulders to fine rock powder which a glacier leaves behind.’
- ‘Boulder clay, the most widespread deposit, represents the ground moraine of the ice sheet.’
- ‘These are moraines - glacial deposits of sand and boulders - marking the western limit of glacial ice in the Stewart River Valley some 14,000 years ago, during the most recent ice age.’
- ‘This relationship suggests that the area of transverse moraines formed below the ice mass that remained in north-central Ireland following early deglaciation.’
Late 18th century from French, from Italian dialect morena, from French dialect morre ‘snout’; related to morion.
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