Mass Movement

Question 1

what are the 7 main types of mass movement

Answer 1

mudflows
rockfall
landslides
slumps
run-off
solifluction
soil creep

Question 2

what are mudflows

Answer 2

when increased water content in the soil reduces friction leading to mud flowing over underlying bed rock, this increases pore water pressure and affects water quality

Question 3

what are rockfalls

Answer 3

when the cliff face is over 40 degrees and has been exposed to mechanical weathering resulting in scree forming

Question 4

what is scree

Answer 4

scree is the build up of rock fragments at the base of the cliff as a result of mechanical weathering

Question 5

what are landslides

Answer 5

when rainfall leads to water getting into joints and the bedding planes, reducing friction between them resulting in a landslide where a block of intact rock quickly moves down the cliff face

Question 6

what are slumps

Answer 6

they’re curved, weak and unconsolidated areas of clay or sand. the build up of pore water pressure means it collapses under its own weight

Question 7

what’s run-off

Answer 7

when heavy rainfall washes material from the surface of a cliff over the edge and down onto the shore

Question 8

what’s solifluction

Answer 8

it’s the mass movement of soil that becomes ​waterlogged when water is trapped between the active layer and the frozen permafrost

Question 9

what’s soil creep

Answer 9

the slowest and most continuous movement, particles move downhill from wetting and drying