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📘 Stand where the land ends

Stand at the edge of a high coast and watch a wave strike the same dark band of rock again and again. A cliff is not simply a tall beach; it is a steep landform maintained where wave attack reaches the foot of elevated, relatively resistant

4
lessons
~20 min
to learn
Adults
level
Start the course →

What you’ll learn

  1. The rock beneath the shorelineExplain how rock strength, structure, and wave attack maintain and retreat coastal cliffs.Cliffs form where elevated ground meets wave energy and resistant or fractured rock controls the pace and style of retreat.
  2. When loose material can gatherDescribe beaches as mobile sediment stores and identify why width, source, and supply matter.Beaches are made of movable grains whose sources, slopes, and available space determine whether they buffer or expose the coast.
  3. The coastline is a conveyor beltTrace longshore drift and storm-driven sediment movement along a coast.Waves move sand across and along the shore, so storms and barriers can rearrange a beach system rather than simply erase it.
  4. One coast can contain both answersUse local geology, wave exposure, sediment pathways, and seabed shape to explain neighboring cliffs and beaches.Cliff and beach are changing outcomes of a local balance, not permanent categories assigned to an entire coastline.

Questions this course answers

Which combination most directly favors a steep coastal cliff?

A cliff is maintained when elevated ground resists collapse while waves erode or undercut its foot.

Where can beach sediment come from?

Beaches collect movable sediment from many sources, then waves and currents redistribute it.

What is longshore drift?

Angled swash and returning backwash move grains in a zigzag that produces alongshore transport.

Why can one coastline have cliffs beside beaches?

Coastal form depends on local geology, energy, sediment pathways, and three-dimensional shoreline geometry.

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