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Processes (mas movement (Landslide (Blocks slide downslope due to gravity…
Processes
mas movement
Landslide
Blocks slide downslope due to gravity enmass, little flow
Rotational Slip
Movement along curved sheer plane, saturated material rotates as flows downslope, lobes left behind
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Mudflow
high water content, material rotates on itself as moves downslope
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Soil Creep
Slowest= continuous, creates steps in ground, saturated matter moves downslope, seen by bent trees
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Waves
Types
Construcitve
Low frequency, low height, builds up beaches, weak backwash, strong swash
Destructive
high frequency, high height, plunges down, powerful backwash, erodes beach
Wave refraction
Concentrates energy at headlands. waves band to shape of coastline. erosion at headland and deposition in bays
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Tides
Spring
sun and moon aligned, greater erosion and flood risk
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Weathering
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Physical
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Freeze-Thaw
Water gets into cracks, freezes and expands by 10%, breaks rock and occurs again and again
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longshore drift
Matter transported along coastline, waves approach obliquely to coast and return parallel to create movement of sediment