Transcript Document
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 Formation - Inputs • Alternating bands of parallel soft and resistant rocks • Perpendicular to the sea • Destructive waves • Weak swash and strong backwash Formation - Processes 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 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 Formation - Processes • How soft rocks are eroded • A notch is formed • The unsupported material collapses • The repeated process causes the soft rock to retreat 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 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 Headlands and bays… Landforms formed from headlands WS Activity Number Pad 1 abc 2 def 3 ghi 4 jkl 5 mno 6 pqr 7 stu 8 vwx 9 yz