Distinctively Coastal Processes (AQA A-Level Geography): Flashcards

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Distinctively coastal processes
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Marine processes

Sea-connected processes: waves, tides, longshore drift

Sub-aerial processes

Land processes; material broken down in situ (original position)

Sediment budget

Balance between sediment entering & leaving a coastal cell

Positive sediment budget result

Progradation: shoreline builds seaward

Hydraulic action

Erosive impact of water itself without debris/rock fragments

Wave quarrying

Air trapped & compressed in cracks; explosive release weakens rock

Abrasion (corrasion)

Sea uses sediment as tools to grind & wear away the coastline

Attrition

Rocks collide with each other, becoming smaller & more rounded

Fetch

Distance of open water over which wind blows to generate waves

Lithology

Physical & chemical characteristics of rocks, esp. resistance

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