Waterfalls And Vshape Valley Flashcards
What is the first thing that happens at a waterfall?
Undercutting
What is the second thing that happens at a waterfall?
The overhang collapses
What is the 3rd thing that happens at a waterfall?
A plunge pool develops
What is the 4th thing that happens at a waterfall?
The waterfall retreats
What is the last thing that happens at a waterfall?
A steep gorge like valley forms
What are the 4 processes of erosion?
Hydraulic Action
Abrasion
Solution
Attrition
What creates an overhang?
The 4 processes of erosion cause the softer rock to be eroded quicker than the hard rock!
This creates an overhang
What happens to the softer rock?
The softer rock is undercut, turning the waterfalls into a deep plunge pool.
What happens when the overhang is no longer supported and where does it go?
The overhang when no longer supported collapses into the plunge pool
What is created when the waterfall retreats and where does it go?
A gorge is created as a waterfall retreats up stream towards the river, mouth this is a steep sided valley.
What forms as the river erodes downwards?
V-shaped valleys are formed as the river erodes downwards (vertically)
What happens around the foot of a hill?
It causes interlocking spurs as the river winds around the foot of the hills.
