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By ice, Cumbria

This ridge along the edge of a field is evidence that this area was covered by ice about 10,000 years ago. It was not constructed, but was left at the front of a melting glacier, as with melting glaciers in Canada or Norway today.

As glaciers move they scrape along the valley floor eroding large amounts of rock. material. They also transport frost-shattered boulders that fall from the valley sides and land on the glacier. When the glacier melts, this mixture of finely-ground rock, pebbles and large boulders, called moraine - is left as ridges both at the glacier “snout” (terminal moraine) and along the valley sides (lateral moraine).

Glacial moraine at Borrowdale, Lake District

Glacial moraine, Borrowdale
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