Case Study: Helvellyn, Lake District (AQA A-Level Geography): Flashcards
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Height of Helvellyn peak
Height of Helvellyn peak
950 metres
No. of ice advances in Helvellyn area over 800,000 years
No. of ice advances in Helvellyn area over 800,000 years
11 times
Abrasion (glacial erosion)
Abrasion (glacial erosion)
Rock fragments in glacier base scrape & scratch bedrock
Plucking (glacial erosion)
Plucking (glacial erosion)
Ice freezes onto bedrock & pulls away rock blocks
Corrie
Corrie
Armchair-shaped hollow in mountainside formed by glacial erosion
Number of corries in Lake District
Number of corries in Lake District
Over 150
Corrie orientation in Helvellyn Range
Corrie orientation in Helvellyn Range
Most on eastern side (east-facing slopes)
Arête
Arête
Narrow knife-edge ridge between two adjacent corries
Ribbon lake
Ribbon lake
Long, narrow lake in glacially over-deepened valley
Glacial trough cross-section shape
Glacial trough cross-section shape
U-shaped