1. Work of Waves

2. Learning objectives:
…Explain the processes of erosion, deposition and transportation at the coast.
…Explain how the process of erosion creates caves, arches and stacks.
…Identify different types of erosion and weathering that occur on the coast.

3. Prediction… How may this change in 1000 years

4. The formation of headlands and bays

7. Photograph shows headland and bays at Forvie Sands Nature Reserve – NE Scotland

8. Hackley Bay

11. Cracks Become Caves Cave formation on Ballintoy coast, Ireland

13. Caves Become Arches
An arch on Lighthouse Field state beach, California

15. Arches Become Stacks
A stack on the South Devon coast

18. Joint or fault in resistant rock
Roof of arch becomes too heavy to be supported and collapses
A stack is an isolated part of a cliff
The stack us undercut and collapses to leave a stump
Waves cut through headland to form an arch which is continually widened at its base
Abrasion and hydraulic action of waves widens the weakness in the cliff to form a cave
Chemical weathering from the waves and rain cause the rocks to be weathered
Biological weathering from roots occurs at the top of the rock.

19. Terminology used today:
New words:
Headland
Bay
Cliff
Crack
Cave
Arch
Stack
Stump
Coastal retreat
Words we should have also used:
Erosion
Weathering
Hydraulic action
Solution
Attrition
abrasion

21. http://www. bing. com/videos/search