The Tees River has a flow rate of 20 cubic meters per second. Waterfalls form when the top layer of harder rock cannot be eroded as quickly as the softer lower layers, causing the upper rock to collapse periodically and the waterfall to move upstream, creating a gorge with steep sides and the river at the bottom downstream from the waterfall.

1. The Tees has a of 20 cubic meters a second (20m3/s). The key to
the formation of % of waterfalls worldwide is . In the Tees example,
the rock layer on top is whinstone; it’s so hard that the river can’t wear
it away. The layer of rock underneath gets slowly worn away, until the
R rock on top falls and is swept away by the river. The process now
starts again, with the rock again being worn away until a layer of
rock is left hanging and collapses. As a result, the waterfall actually moves
UPSTREAM from where it started. This creates a new landform: a gash in
the landscape with very steep sides and a river at the bottom – a GORGE .
The GORGE is what lies DOWNSTREAM from the waterfall at high force.
Write a short paragraph to describe the process below