2. U Shaped Valley Glen Clova, Angus, Great Britain A valley that forms when a glacier erodes a river valley from its original V shape to a U shape
3. Where photograph was taken U shaped valley Truncated spurs Misfit stream Flat glacial trough; no contour lines
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5. Cirque (or Corrie) Llyn y Gadair, Gwynedd, Great Britain A bowl-shaped depression carved out of a mountain by an alpine glacier A steep-walled hollow, shaped like a half-bowl, formed by glaciation and frost wedging Cirques are found in mountainous regions populated with glaciers, or which have had a history of being glaciated
9. Hanging Valley A shallow glacial trough that leads into the side of a larger, main glacial trough A valley most often formed as a result of glaciation, where a large glacier erodes a valley, at a perpendicular angle to the hanging valley, to a deeper extent. The result is that of a small valley intersecting a larger valley at an elevation noticeably above the bottom of the larger valley. Hanging valleys can be, but are not always, eroded by a glacier.
10. Hanging Valley animation http://www3.interscience.wiley.com:8100/legacy/college/strahler/0471238007/animations/ch20_animations/animation2.html Hanging Valley Stream leading to hanging valley Lake carved out by large glacier
11. Arête A sharp narrow ridge found in rugged mountains A sharp-edged ridge of rock formed between adjacent cirque glaciers An arête is a thin, almost knife-like, ridge of rock which is typically formed when two glaciers erode parallel U-shaped valleys. The arête is a thin ridge of rock that is left separating the two valleys.
12. GribGoch, Snowdia National Park in Gwynedd, Wales Arête Cirque RibbonLake
14. Horn A high mountain peak that forms when the walls of three or more glacial cirques intersect. A pyramidal peak, or sometimes in its most extreme form called a glacial horn, is a mountaintop that has been modified by the action of ice during glaciation and frost weathering.
16. Topographic map of Mount Wilbur Ribbon Lake Glacial Horn Cirque U-shape Valley?
17. Moraines Glacial moraine at Borrowdale, Lake District, Cumbria Moraine : a French word that refers to any glacier-formed accumulation . Terminal moraine : an accumulation at the outermost edge of where a glacier or ice sheet existed. Recessional moraine: moraine located "behind" the outermost edge of a glacier, formed when the glacier lingers in one spot for a long time. Ground moraine: gently rolling hills and plains deposited by ice. Lateral moraine: ridges of till on the sides of a glacier. Medial moraine: a moraine formed when two glaciers merge (a tributary and trunk glacier) and their lateral moraines come together to form a single moraine. Push moraine: a moraine created by till that was a moraine deposited by an earlier glacier that once covered the area. Ablation moraine: a moraine formed from material that fell upon the glacier.
19. 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 – moraine – is left as ridges both at the glacier “snout” (terminal moraine) and along the valley sides (lateral moraine).