weathering and erosion

    Cards (22)

    • Erosion is the movement or removal of rock fragments by wind, water, ice, or gravity.
    • Weathering is the breakdown of rocks into smaller pieces without moving them.
    • weathering of glaciers is a process whereby the glacier erodes the rock
    • glacial erosion occurs when the weight of the glacier causes it to crush and grind against the bedrock below
    • Plucking is process of erosion that occcus during glaciation As ice and glaciers move, they scrape along the surrounding rock and pull away pieces of rock which causes erosion.
    • abrasion is caused by the friction between the rock surface and the sediment carried within the glacier
    • a tarn is a lake formed in a corrie
    • a corrie is a steep sided valley that is formed by glaciers
    • a hanging valley is formed by deep erosion of glaciers
    • truncated spur is are landforms that occur in glaciated areas where the glacier has retreated
    • Moraines are formed by glacial meltwater and debris carried by glaciers.
    • A terminal moraine is a ridge of material deposited at the end of a glacier
    • plucking creates a steep back wall and abrasion further deepens the hollow where the corrie is created
    • An arĂȘte is knife edge ridge formed when two Corries are back to back
    • a pyramidal peak is formed when 3 or 4 corries meet around a mountain
    • landform is something that forms over land
    • A cirque is a bowl shaped depression at the head of a valley, it has been carved out by glacial action
    • The cirque is made up of a U-shaped valley with a flat floor and steep sides
    • A large glacier eroded thought the v shaped valley creating it into a u shapwd valley
    • two main types of erosion are plucking and abrasian
    • abrasion is where rock fragments carried along by the glaciers rub against the surface of the bedrock causing it to wear down
    • plucking is where ice picks up rocks from the bedrock below and carries them away
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