coast Flashcards

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1
Q

Caves, arches, stacks and stumps

A
  • Cracks are formed in the headland through the erosion al processes of hydraulic action and abrasion.
  • As the waves continue to grind away at the crack, it begins to open up to form a cave.
  • The cave becomes larger and eventually breaks through the headland to form an arch
  • The base of the arch continually becomes wider through further erosion, until its roof becomes too heavy and collapses into the sea. This leaves a stack.
  • The stack is undercut at the base until it collapses to form a stump
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2
Q

mechanical weathering

A

Mechanical weathering (Freeze thaw)
- Water enters cracks in the rock.
- When temperature drop, the water freezes and expands causing the crack to widen
- The ice melts and water makes its way deeper into the cracks.
- The process then repeats until the rock cracks

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