417 words used in the labs.

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Term

Nick point

Also written: Knickpoint

An abrupt steepening in a river’s long profile, also written knickpoint. A waterfall is one example. Resistant rock, uplift or a change in base level can produce one, and erosion may cause it to migrate upstream.

What to look for

Cwmorthin waterfall and plunge pool, Wales. Falling water and entrained sediment erode the pool below the step in the river bed.

Related labs

River erosion →

Mark understood

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