8 1 mass movement
TRANSCRIPT
Mass movement Mass movement
Any kind of erosion by gravityAny kind of erosion by gravity
Makes mountains smaller Makes mountains smaller
Erosion – wears way surface materials and Erosion – wears way surface materials and moves them someplace else moves them someplace else
Agents of erosion Agents of erosion
Gravity Gravity Glaciers Glaciers Water Water Wind Wind
Deposition Deposition
Dropping of sediment when agent of erosion Dropping of sediment when agent of erosion loses energy loses energy
Gravity erosions Gravity erosions
Name Name of of erosion erosion
Speed Speed Physical Physical description description
Weathering that Weathering that causes it causes it
Slump Slump Fast Fast Mass of Mass of material slips material slips down a curved down a curved surface surface
Water weakens a Water weakens a layer of soil. Or a layer of soil. Or a strong layers lays strong layers lays on top a weaker on top a weaker layer layer
Slump Slump
Creep Creep Slow Slow Soils very Soils very slowly move slowly move down hill down hill
Ice Ice wedging wedging - -
Name Name Speed Speed Description Description Weathering Weathering Sketch Sketch
Rock fall Rock fall Fast Fast Blocks of Blocks of rock work rock work loose of loose of slope and slope and come come crashing crashing down often down often in spring in spring
Ice Ice wedging wedging heavy rain heavy rain
Name Name Speed Speed DescriptiDescription on
Weathering Weathering SSkkeettcchh
Rock Rock slide slide
Fast Fast Whole Whole layer of layer of rock slips rock slips down hill down hill
After heavy rains After heavy rains or earthquake or earthquake
Name Name SpeeSpeed d
Description Description Reason /Reason /weatheriweathering ng
Mudflow Mudflow Fast Fast Thick layer of Thick layer of loose loose sediment sediment moves moves downhill downhill
Removal Removal of grass ( of grass ( drought drought or fire) or fire) then then heavy heavy rain. rain.
Fan Fan shaped shaped deposit. deposit.
Mass movement Mass movement
All are on steep slope All are on steep slope Gravity causes all Gravity causes all Often occur after heavy rain ( or Often occur after heavy rain ( or
earthquake) earthquake)
Building on slopes. Building on slopes.
Pros? ( good things) Pros? ( good things)
Cons? (bad stuff) Cons? (bad stuff)
Ways to slow mass movement Ways to slow mass movement
Plant veggies (plants- grass trees) will help Plant veggies (plants- grass trees) will help hold soil in place. hold soil in place.
Drainage pipes – to remove water Drainage pipes – to remove water Concrete or stone walls – retaining walls Concrete or stone walls – retaining walls You may slow mass movements but you You may slow mass movements but you
can never STOP it can never STOP it