Coastal erosion

Coastal erosion

اسلاید 1:  Tom Abbott, Biddulph High School and made available through www.sln.org.uk/geography and only for non commercial use in schoolsOriginal Land surfaceWave-cut platformstumpstackNatural ArchOld cliffline

اسلاید 2:  Tom Abbott, Biddulph High School and made available through www.sln.org.uk/geography and only for non commercial use in schoolsJoints and beds allowwaves to attack the cliff more easilyWaves can use rocks to erode the cliffWave cut platformWave cut notchCliff lineHIGH TIDE LEVEL

اسلاید 3:  Tom Abbott, Biddulph High School and made available through www.sln.org.uk/geography and only for non commercial use in schoolsGroynesSediment accumulation due to Longshore DriftWaves approach beach at oblique angle

اسلاید 4:  Tom Abbott, Biddulph High School and made available through www.sln.org.uk/geography and only for non commercial use in schoolsWave-cut platformWave built terracelarge angular rocksrocks and pebblessoft sand Ouch!

اسلاید 5:  Tom Abbott, Biddulph High School and made available through www.sln.org.uk/geography and only for non commercial use in schoolsThe force of the waves pushes air into cracks in the rockThe compressed air exerts enormous pressure at the tip of the crack. As the water falls back the air pressure is released and rock is pulled out from the crack further enlarging the hole.

اسلاید 6:  Tom Abbott, Biddulph High School and made available through www.sln.org.uk/geography and only for non commercial use in schoolsConstructive WavesSpilling BreakerPowerful SwashWeak Backwash

اسلاید 7:  Tom Abbott, Biddulph High School and made available through www.sln.org.uk/geography and only for non commercial use in schoolsConstructive WavesCrashing breakerWeak swashPowerful Backwash

اسلاید 8:  Tom Abbott, Biddulph High School and made available through www.sln.org.uk/geography and only for non commercial use in schoolsThis powerpoint was kindly donated to www.worldofteaching.comhttp://www.worldofteaching.com is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching.