Coastal Erosion and Glacial Landforms

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Questions and Answers

Which process do waves primarily use to shape the coast?

Sedimentation
Depositing sediments
Weathering and erosion (correct)
Flooding

A kettle lake forms only when a glacier retreats and melts completely.

True (A)

What is an arete?

A sharp ridge separating two cirques

The mixture of sediments that glaciers deposit directly onto the surface is called __________.

<p>till</p> Signup and view all the answers

Match the following glacial landforms with their definitions:

<p>Cirque = A bowl-shaped hollow eroded by a glacier Horn = A sharpened peak formed by glaciers Moraine = A ridge formed where glacier deposits till Fjord = A valley filled by rising sea levels after a glacier melts</p> Signup and view all the answers

Flashcards

Wave Erosion

The process by which waves break down rocks and move sediments along the coast.

Kettle Lake

A lake formed in a depression left by a melting block of ice in glacial till.

Cirque

A bowl-shaped hollow created by glacial erosion.

Moraine

A ridge formed by glacial deposits of till.

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Till

A mixture of sediments deposited directly by a glacier.

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Study Notes

Coastal Erosion by Waves

Waves erode coastlines by breaking down rock, moving sediments, and impacting rocks with force.
Waves enlarge cracks in rocks, causing pieces to break off.
Abrasion is another way waves break apart rocks.

Glacial Landforms

Glaciers carve landforms through erosion and deposition.
Cirque: A bowl-shaped hollow eroded by a glacier.
U-shaped valley: A valley scooped out by a flowing glacier.
Arete: A sharp ridge separating two cirques.
Kettle lake: Forms when a depression left by melting ice fills with water.
Horn: A sharpened mountain peak formed by glaciers eroding its sides.
Moraine: A ridge formed by glacial till deposition.
Fjord: A valley filled with rising sea levels after a glacier's retreat.
Till: The mixture of sediments (clay, silt, sand, gravel, boulders, rock flour) deposited directly by a glacier.