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Understanding Coastal Erosion and Formation of Landforms Like Caves and Stacks

Explore the dynamic processes of erosion, deposition, and transportation along the coast. This learning module delves into the formation of caves, arches, and stacks through erosion by waves and weathering. Learn how coastal features evolve over time, predicting changes over the next 1,000 years. Discover the geological processes that create headlands and bays, and how various types of erosion shape our coastlines. Engage with interactive content through videos showcasing beautiful coastal formations like those found on Ballintoy coast, Ireland, and South Devon coast.

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Understanding Coastal Erosion and Formation of Landforms Like Caves and Stacks

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Presentation Transcript

  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

  5. Cracks Become Caves Cave formation on Ballintoy coast, Ireland http://www.youtube.com/watch?v=2fS2Swi0q-U&feature=related

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

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

  8. 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.

  9. 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 Terminology used today:

  10. http://www.bing.com/videos/search?q=formation+of+a+stack+coasts&view=detail&mid=0928E2F0EE5E7E3E134D0928E2F0EE5E7E3E134D&first=0http://www.bing.com/videos/search?q=formation+of+a+stack+coasts&view=detail&mid=0928E2F0EE5E7E3E134D0928E2F0EE5E7E3E134D&first=0 • http://www.bing.com/videos/search?q=formation+of+a+sea+stack&view=detail&mid=3560880BE2BA51435BB53560880BE2BA51435BB5&first=0

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