Periglacial Landforms/Processes Flashcards
Nivation Hollow
Snow protected in hollow
Compaction
Underlying soil + rocks weakened
Erosion + weathering
Ground contraction forms
Ice Wedges
(+Freeze Thaw)
Frost Heave forms
Patterned Ground
Pingos
Solifluction Lobes
AL thaws
Meltwater reduces soil friction
AL moves downslope
Rounded, tongue like features form
Patterned Ground
AL freezes, ice crystals form
Soil volume rises
Soils expand unevenly
Stones heat up faster + rise
Forms patterns
Ice Lens
Soil moisture freed
Lens forms
Grown by water movement through soil
Expands + lifts land
Pingo (Open System)
Disc. permafrost
Water seeps through
Creates ice lens
Dome heaves land upwards
Ice Wedges
Thawing + refreezing of AL
Soil contractions
Cracks fill with water
Freeze thaw repitition
Scree Slopes
Exposed rock face
Freeze thaw
Rockfall occurs
Scree accumulates
Parts of Scree Slope
Free Face (Source)
Transport Slope
Accumulation Slope
Ground Ice Features
Ice Wedges
Patterned Ground
Pingos
Ice Lens
Freeze thaw + Mass movement landforms
Nivation Hollow
Scree Slope
Solifluction Lobes
