Page "River Mole" Paragraph 32

At Leatherhead the river leaves the chalk bedrock, moving on to London Clay.

The river meanders across an alluvial plain of between 400 m and 800 m wide towards Cobham, where it begins to descend to a lower flood plain which in turn broadens to the axehead meander at Painshill Park.

At the east end of Painshill Park, the lower flood plain abruptly narrows to form a narrow trench approximately 60 m wide, in which the river runs northwards for towards Hersham, where the river enters the flood plain of the River Thames.