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Definition

Definition. Headland 1. A Headland is an area of land adjacent to water on three sides 2. An area of land that protrudes into the sea Bay 1. A Bay is the reverse, an area of water bordered by land on three sides 2. A body of water partially enclosed by land but with a wide mouth

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Definition

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Presentation Transcript

  1. Definition Headland 1. A Headland is an area of land adjacent to water on three sides 2. An area of land that protrudes into the sea Bay 1. A Bay is the reverse, an area of water bordered by land on three sides 2. A body of water partially enclosed by land but with a wide mouth *Bay refers to the water, not the land

  2. Formation - Inputs • Alternating bands of parallel soft and resistant rocks • Perpendicular to the sea • Destructive waves • Weak swash and strong backwash

  3. Formation - Processes

  4. Formation - Processes • Headlands and bays have different resistance against erosion • Erosion processes such as • Hydraulic action • Corrasion • Attrition • Due to the differential rates of erosion, resistant rocks would protrude to form Headlands • The body to water that is formed due to the retreat of the soft rock is called the bay

  5. Erosion Processes Abrasion/ Corrasion • Rock debris hurled against the coast by waves wears away coastal rocks Attrition • Rock particles in water knock against and break down each other. This results in the rocks being smaller, smoother and more rounded Corrosion/ Solution • The dissolving of soluble minerals in rocks by seawater Hydraulic action - Impacts of waves crashing on the coast which causes the rocks to break apart and be removed

  6. Formation - Processes • How soft rocks are eroded • A notch is formed • The unsupported material collapses • The repeated process causes the soft rock to retreat

  7. Formation - Outputs • When the soft rocks retreat, the resistant rocks are exposed to form headlands • Headlands are subjected to erosion by wave refraction to form coastal landforms. They are caves, arches, stacks then stumps • These stumps are eventually eroded too, which results in the retreat of the headland

  8. Formation - Outputs • Bay-head beaches would form as sea deposits materials in the bay • This causes the bay to advance • These two processes eventually straighten out the coastline, and the whole process repeats

  9. Headlands and bays…

  10. Landforms formed from headlands

  11. Number Pad 1 abc 2 def 3 ghi 4 jkl 5 mno 6 pqr 7 stu 8 vwx 9 yz WS Activity

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