Glaciated upland landscapes (Edexcel GCSE Geography A): Flashcards

Water enters cracks, freezes & expands 9%, breaks rock to scree

9%

Loose rock fragments at slope base from freeze-thaw weathering

Embedded rocks in glacier scrape bedrock like sandpaper

Grooves in bedrock showing direction of ice flow

Blocks freeze to glacier base & are pulled away as ice moves

Meltwater lubricates base, allowing glacier to slide downhill

Ice crystals slide over each other, causing ice to deform

Well-sorted sediments carried & deposited by meltwater streams

Unsorted mix deposited directly by ice without water transport

Approximately 12,000 years ago

Summer melting of snow and ice

Ablation exceeds accumulation