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All the glaciers in Turkey are in retreat and glaciers have been developing proglacial lakes at their terminal ends as the glaciers thin and retreat. [ 61 ] [ 62 ] Between the 1970s and 2013, the glaciers in Turkey lost half their area, going from 25 km 2 (9.7 sq mi) in the 1970s to 10.85 km 2 (4.19 sq mi) in 2013.
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The retreating glaciers of the last ice age, both depressed the terrain with their mass and provided a source of meltwater that was confined against the ice mass. Lake Algonquin is an example of a proglacial lake that existed in east-central North America at the time of the last ice age .
Erosional landforms. As the glaciers expand, due to their accumulating weight of snow and ice they crush, abrade, and scour surfaces such as rocks and bedrock.The resulting erosional landforms include striations, cirques, glacial horns, arêtes, trim lines, U-shaped valleys, roches moutonnées, overdeepenings and hanging valleys.
A shrinking glacier thins faster near the terminus than near the head, which explains why glaciers retreat up-valley and the glacier head stays in place [3] The speed of erosion or accumulation is partly dependent on a shape factor which is the ratio of the change in thickness at the glacier head to the change in the thickness at the terminus. [4]
The Holocene glacial retreat is a geographical phenomenon that involved the global retreat of glaciers (deglaciation) that previously had advanced during the Last Glacial Maximum. Ice sheet retreat initiated ca. 19,000 years ago and accelerated after ca. 15,000 years ago.
A glacial terminus Satellite view of changing glacier termini in the Bhutan-Himalaya, showing glacial lakes formed by the retreating termini on the surface of the debris-covered glaciers over the last several decades. A glacier terminus, toe, or snout, is the end of a glacier at any given point in time.