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Features of cold environments Heleena Chauhan




Features of a cold environment:
Glacial erosion features:

Till:
Unsorted mixture of sediment, clay, gravel and rock deposited by a glacier, it is
sometimes called moraine or boulder clay.

Cirques:
A cirque is an armchair shaped hollow surrounded by knifeedged ridges called Arêtes
Cirques…

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Features of cold environments Heleena Chauhan




Glacial trough and Ushaped valleys:
A glacial trough's characteristics are its steep
sides and relatively flat bottom it is usually
referred to as a Ushaped valley, few are
shaped that way.
Their form depends on mass movements,
deposition and erosion by river, since the…

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Features of cold environments Heleena Chauhan




Moraine:
Glacial deposits consisting of poorly sorted often angular, loose fragments. Many
forms exist including englacial, lateral, medial, terminal and recessional.

Fjord:
These are glacial troughs below or partly below sea level. Up to ¼ of
fjords have active glaciers. Fjords are more likely…

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Features of cold environments Heleena Chauhan




Glacial deposition:

Erratics:
Erratics are large boulders foreign to the local geology that have been dumped by
the ice, usually on flat areas. Some Erratics have been left stranded in precarious
positions as perched blocks such as the bluish microgranite from an island off…

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Features of cold environments Heleena Chauhan





Exam questions:
· Jan 2010 With reference to located examples of distinctive landforms, examine
the impact of climate and weathering on the physical landscape of cold environments
(25 marks)
· June 2009 ­ Identify the distinctive landforms produced by ice, A, B, C and…

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