CLIP 3245
Old Harry Rocks - coastal processes and landforms
Key Info
- Old Harry Rocks - coastal processes and landforms
- Duration: 04:16
- The cliffs around Old Harry Rocks are made of chalk. Wave refraction causes erosion of the headland and deposition in the bays either side. The cliffs are eroded when waves undercut the land causing the rock above to collapse. Caves are formed where cracks in the chalk are expanded due to hydraulic action. Caves can open up through the cliff to form arches and the collapse of arches results in stacks such as Old Harry Rocks.
- Subject:
Geography
Topic:Coastal Environment: Processes and Landforms
- Keywords: chalk, headland, bay, refraction, waves, Studland, Swanage, deposition, beach, destructive waves, Old Harry Rocks, cliff, undercutting, erosion, stack, arch, cave, crevice, stump, hydraulic action
Ideas for use in class
- Would complement a coastal module in any key stage. Old Harry Rocks is a good case study showing how coastal erosion forms caves, arches, stacks and stumps. As students watch the clip, they could be asked to write definitions for the landforms they see.
Background details
- Clip language : English
- Aspect ratio : 4x3
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