the formation of rochee mountonne and explain the formation of rochee mountonne.


It's a french term for a glacially moulded rock mound exhibiting asymmetrical form with a gently sloping and smoothly abraded, upvalley face with steeper,broken,ice-plucked,down valley face(leeward side).It may be also regarded as a streamlined bedrock hill.It's larger variant is called Flyggberg.

It's formation is attributed to plucking action on the lee side and in order that the leeside be affected by plucking,there has to be no caity of any size on the leeside of obstruction.As a result ,tensile stresses and freeze and thaw processes in the combination create a plucked lee face. 

Rostas and sepala(1981) in an extensive survey of the south Finland found a close relationship between bedrock joint systems, fissures and the size and the morphology of the individual forms of the rochee mountonne.Glacial polish near the crests of the roches mountonnes,gently sloping abraded by clasts will depend on the particle size.

The glacialpolosh on the lee side reflect the sorting between larger clasts than the smaller particles with the bed.the crescentic fractures concentrated at it's crests were formed due to large rock fragments which were presumably concentrated near bump rests.

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