Coastal Processes: Erosion Flashcards

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What is erosion and how does it affect coastlines?

Erosion is the wearing away of rock along the coastline and the transportation of this material by natural forces.

It can devastate coastal regions, wearing away cliff faces and damaging habitats, and creates features like bays.

What role do destructive waves play in erosion?

Destructive waves have a strong backwash which contributes to erosion by carrying away material from the coastline.

What is hydraulic action?

Hydraulic action is the power of destructive waves smashing into rock, compressing air in cracks, and causing the rock to break apart.

How does abrasion contribute to erosion?

Abrasion involves material grinding along the rock like sandpaper, smoothing the rock over time as waves hurl the material at the rock face.

What is attrition and where does it primarily occur?

Attrition occurs within the sea, where rocks and pebbles knock against each other, breaking apart and becoming smaller, rounder and smoother, contributing to sand formation.

What is solution in the context of erosion?

Solution, or chemical weathering, is the dissolving of certain types of rocks by seawater.

Weaker rocks like limestone are more vulnerable to this process.

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