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  2. Retreat of glaciers since 1850 - Wikipedia

    en.wikipedia.org/wiki/Retreat_of_glaciers_since_1850

    Satellite images and aerial photographs from the 1950s and 1970s show that the front of the glacier had remained in the same place for decades. In 2001 the glacier began retreating rapidly, and by 2005 the glacier had retreated a total of 7.2 km (4.5 mi), accelerating from 20 m (66 ft) per day to 35 m (115 ft) per day during that period. [117]

  3. Glacier terminus - Wikipedia

    en.wikipedia.org/wiki/Glacier_terminus

    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.

  4. Concrete pavement restoration - Wikipedia

    en.wikipedia.org/wiki/Concrete_Pavement_Restoration

    CPP and CPR methods, developed over the last 40 years, are used in lieu of asphalt overlays and bituminous patches to repair roads when longer lasting solutions are desired. When installing pavers over top of an existing asphalt of concrete pad, there are three installation options: sand set, bituminous set, and mortar set. [1]

  5. Proglacial lake - Wikipedia

    en.wikipedia.org/wiki/Proglacial_lake

    Tarn—a proglacial lake impounded by the terminal moraine of the retreating Schoolroom Glacier in Grand Teton National Park, Wyoming In geology, a proglacial lake is a lake formed either by the damming action of a moraine during the retreat of a melting glacier , a glacial ice dam, or by meltwater trapped against an ice sheet due to isostatic ...

  6. Glacial motion - Wikipedia

    en.wikipedia.org/wiki/Glacial_motion

    At some point, if an Alpine glacier becomes too thin it will stop moving. This will result in the end of any basal erosion. The stream issuing from the glacier will then become clearer as glacial flour diminishes. Lakes and ponds can also be caused by glacial movement. Kettle lakes form when a retreating glacier leaves behind an underground ...

  7. Holocene glacial retreat - Wikipedia

    en.wikipedia.org/wiki/Holocene_glacial_retreat

    The Ohio River largely supplanted the former Teays River drainage system, which was disrupted by the glaciers. Ancient Lake Chicago, on the southern margin of the Wisconsin Glacier, found successive lower outlets as the glacier retreated until the Saint Lawrence River route was uncovered. Corresponding to each level, remnant lake shore features ...

  8. Glacier head - Wikipedia

    en.wikipedia.org/wiki/Glacier_head

    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]

  9. Esker - Wikipedia

    en.wikipedia.org/wiki/Esker

    Plastic flow and melting of the basal ice determines the size and shape of the subglacial tunnel. This in turn determines the shape, composition and structure of an esker. Eskers may exist as a single channel, or may be part of a branching system with tributary eskers. They are not often found as continuous ridges, but have gaps that separate ...