Page 136 - Science Course 2 (Book 2)

Mo11-L2b: What is Deposition

Deposition Key Concept

Deposition is the process of laying down eroded What is Deposition?
material in a new location.
How does deposition change Earth’s surface?
If the speed of f owing
water decreases, the
water can no longer
carry sediment and the
sediment settles at
the bottom of the
water.

Floodplains form when
sediment settles out of rivers
that f ood the areas next to them.

The locations where sediment accumulates are
called sedimentary basins.

When glaciers melt, the water produced by the melt- Formation of a
ing ice does not f ow fast enough to carry sediment. sedimentary basin

Glacial deposits of sediment are called moraines.
4 4

3

1 5 1
2 2

1. Earth’s surface is pulled apart due to movement of
the plates.

2-3. Faults form and a sedimentary basin is created.
Wind also can deposit sediment.
4-5. Sediments are washed from the surrounding
Sand dunes are landforms made as wind continually high ground into the basin where they are
moves and deposits sand grains. deposited in layers.

6. Shallow sea invades the basin also depositing
sediments.

Sediment continues to be deposited in low areas
and then forced upward as tectonic activity forms
mountains.

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