Loading presentation...

Present Remotely

Send the link below via email or IM


Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.


Geography 12 Gradation Project

Wave Action and Coastal Landforms

Allie Friesen

on 12 October 2012

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of Geography 12 Gradation Project

Geography 12 Project
Allie Friesen Parts of a Wave Constructive
(swash is stronger than backwash - builds up coast) Wave Action Destructive
(swash is weaker than backwash - erodes coast) http://www.wiley.com/college/strahler/0471480533/animations/ch19_animations/animation2.html Wave Refraction Swash - the rush of water carried onto a
beach by a breaking wave
Backwash - water returning back into the
ocean after being pushed
onto the shore by a wave Some Useful Terms Wave Action and
Coastal Landforms 4 main ways coastline is eroded:
-CORROSION (materials are dissolved by acidic seawater)
-CORRASION OR ABRASION (sediment wears down rocks and makes them smooth)
-ATTRITION (rocks hit each other and break up)
-HYDRAULIC ACTION (constant pressure against the shore) Coastal Erosion Hydraulic action at the water line of a cliff is called undercutting.
Undercutting causes cliffs to become steeper because they are unable to support themselves and pieces break off. Undercutting Caves






Wave-Cut Platforms What Does Undercutting
Cause? Estuaries: bodies of water that rise and fall with the tides
Rias: long, flooded river valleys created by land subsiding or sea levels rising
Fjords: troughs formed when a glacier eroded a river valley to the ocean Longshore Drift Shorelines/Features waves slow down in shallow water, bending and eroding headlands the movement of sand and sediment along a beach caused by waves and currents a form of deposition Spit - a ridge of sand created by longshore drift
Tombolo - a spit that has grown to connect an island to another island
Groynes - man-made barriers built to stop sand from being removed from a beach by longshore drift Depositional Features Ria Estuary Fjord http://oceanica.cofc.edu/an%20educator'sl%20guide%20to%20folly%20beach/guide/driftanimation.htm
Full transcript