Rates of coastal recession and stability (Edexcel A-Level Geography): Flashcards
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Igneous rock erosion rate (e.g., granite, basalt)
Igneous rock erosion rate (e.g., granite, basalt)
Very slow (<1mm per yr)
Unconsolidated material erosion rate (e.g., boulder clay)
Unconsolidated material erosion rate (e.g., boulder clay)
Very fast (2-10m per yr)
Permeability in rocks
Permeability in rocks
Allows water to pass through (e.g., sandstone, limestone)
Cliff vulnerable to mass movement when?
Cliff vulnerable to mass movement when?
Permeable rock above impermeable weak rock
Halophytes
Halophytes
Plants that can tolerate salt water
Xerophytes
Xerophytes
Plants that can tolerate very dry conditions
Pioneer species
Pioneer species
Plants that initially colonise bare sand or mud
Psammosere
Psammosere
Sand dune succession
Halosere
Halosere
Salt marsh succession
How roots stabilise sediment
How roots stabilise sediment
Bind sediments together, increasing resistance to erosion