landforms

Cards (9)

  • define geos - created by erosion
    • deep and narrow gap in cliff face = expands over a long period of time
    • formed by processes acting on a vertical fault or joint
    • erosion processes acting on resistant geology
  • define blowholes - created by erosion
    • deep caves recessed into cliff face that connects to top of cliff
    • allows water that enters by wave pounding to spray upwards
    • erosion processes acting on resistant geology
  • define headlands and bays - created by erosion
    created where coast line is discordant
    • less resistant geology = erodes faster and retreats landward = creates shallow bay, wide beach and fine sediment.
    • more resistant geology = erodes slower, creating a headland = exposed to marine processes from all sides = increases erosion rate and narrows headland.
  • define wave cut platforms - created by erosion
    • flat intertidal surfaces of resistant rock
    • horizontal geological structure
    • resistant rock underlies a cliff face of less resistant rock
    1. caves
    2. arches
    3. stacks
    4. stumps
    • caves can exist anywhere with resistant geology
    • the rest can only exist after a cave has grown through a headland = narrow headland has higher chance of becoming an arch.
  • define caves - created by erosion
    • formed as wave energy impacts intertidal cliff face
    • formed on more resistant geology = less likely to collapse
  • define arch - created by erosion
    when the cave penetrates to the other side of the headland
  • define stack - created by erosion
    arch widens with erosion = eventually collapses by mass movement = leaves a stack
  • define stump - created by erosion
    formed once stack collapses