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River Landscapes in the UK

River landforms from source to mouth

  • 3 things to know
  • Paper 1 section C

Overview

The formation of interlocking spurs, waterfalls, plunge pools and gorges, meanders with river cliffs and slip-off slopes, ox-bow lakes, levées, flood plains and estuaries.

What you need to know

Answer each one before you reveal it.

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Key term

How does a meander develop over time, from the outside and inside of each bend to the neck between loops?

Process

How does a waterfall form where a band of hard rock lies over softer rock?

Key term

What eventually happens to the overhang of hard rock at a waterfall?

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    What are interlocking spurs, and in which part of a river's course are they found?

    Model answer

    They are ridges of higher, tougher land that jut into the valley from alternate sides in the upper course, so the river winds between them.

  2. 2

    Why does a river wind around spurs instead of cutting straight through them?

    Model answer

    In its upper course it has too little energy for sideways erosion, so it takes the easiest route around the areas of harder rock.

  3. 3

    How does a waterfall form where a band of hard rock lies over softer rock?

    Model answer

    The softer rock downstream is worn away faster, leaving a step, and the falling water then undercuts the soft rock to create a plunge pool beneath an overhang.

  4. 4

    What eventually happens to the overhang of hard rock at a waterfall?

    Model answer

    Left unsupported, it collapses into the plunge pool, and the waterfall retreats a little further upstream.

  5. 5

    How is a gorge formed, and what does one look like?

    Model answer

    It is the narrow, steep-sided section of valley left behind as a waterfall retreats upstream over thousands of years.

  6. 6

    What is a meander, and where in a river's course are meanders common?

    Model answer

    A meander is a pronounced bend in the channel, most common in the middle and lower course where the river crosses flatter land.

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