1.4 what is the role of geology in the development of coastal landforms?
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- Created on: 03-06-13 12:28
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- 1.4 what is the role of geology in the development of coastal landforms?
- Lithological controls on the development of coastal landforms
- coastal geology
- geology
- the nature and structure of rocks at a particular location
- different types of rock
- sedimentary
- depositional
- deposited by:
- rivers
- fluvial deposits
- wind
- aolial -sandstorms, sand dunes
- glacial deposits
- waves
- coastal
- rivers
- shale - boundary between the dark and light peak- Mamtoor
- sand and clay
- Barton-on-sea -Hampshire
- mass movement process
- slides
- slumps
- marl cliffs, east Devon
- flows
- mass movement process
- see 1.4 illustration on worksheet rocks and coast
- Barton-on-sea -Hampshire
- sandstone cliff
- old-red sandstone
- Brandy Head in devon
- chalk cliffs
- Studland in Dorset
- very destructive waves
- forms area of headland and highlad
- very destructive waves
- see 1.4 worksheet rocks and the coast
- Studland in Dorset
- igneous
- magma that has cooled
- extrusive
- cooled above surface i.e lava- ICELAND
- weaker
- intrusive
- cooled below surface i.e magma forms plug EDINBURGH CASTLE
- Granite
- lands end -south eastern tip of england
- castellated cliffs in granite, jersey
- extrusive
- magma that has cooled
- metamorphic
- subjected to high pressure/temp
- therefore changing chemical compossition and structure
- marble to diamond (metamorphic rock)
- therefore changing chemical compossition and structure
- scotland and British Isles (where glaciers have left islands)
- subjected to high pressure/temp
- geology
- the nature and structure of rocks at a particular location
- sedimentary
- lithology
- nature of the rock itself
- i.e its physical, chemical, texture, colour described by its permeability, solubility and hardness
- nature of the rock itself
- geology
- medium to large scale coastal plan
- Gower peninsula, south wales
- contains
- concordant coastline
- south west and north stretches
- discordant coastline
- eastern
- experiencing erosion and creation of headlands and bays
- eastern
- concordant coastline
- illustration pg 22g3 pg 30-31
- contains
- Gower peninsula, south wales
- coastal geology
- structoral controls on the devlopment of landforms
- geological structures
- bedding planes
- layers and gaps between layers
- surface between each layer- weaker, sme or different rocks
- faults
- small scale coastal plan
- geo following a fault line in Torridian Sandstone
- handa island, Assynt, North Scotland
- geo
- narrow cleft that follows a line of weakness inland
- faults
- small scale coastal plan
- geo following a fault line in Torridian Sandstone
- handa island, Assynt, North Scotland
- geo
- narrow cleft that follows a line of weakness inland
- feature of a structure
- blowhole
- when a rock has vertical line of weakness
- when tide high- water forced through pipe onto cliff top
- spouting horn, Kaua'i Island
- blowhole
- geo following a fault line in Torridian Sandstone
- rocks that slide over/past one another
- small scale coastal plan
- feature of a structure
- blowhole
- when a rock has vertical line of weakness
- when tide high- water forced through pipe onto cliff top
- spouting horn, Kaua'i Island
- blowhole
- geo following a fault line in Torridian Sandstone
- rocks that slide over/past one another
- small scale coastal plan
- cracks
- Dartmoor
- often see piles of rocks called tors
- bedding planes
- angles of coast
- concordant
- rocks agree with coast
- geology parallel to coastline
- Lulworth Cove, Dorset
- see seminar 6 geology and erosion on the west coast
- discordant
- rocks disagree with coast
- geology perpendicular to coastline
- Swanage Bay, Dorset
- hard rocks chalk, limestone
- soft rock of clay
- produced swanage beach
- concordant
- geological structures
- Lithological controls on the development of coastal landforms
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