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Coastal landscapes
Deposition
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Created by
Ella Hamilton
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Cards (12)
Lower Course Deposition
Dominant
process
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Deposition of material/sediment
1. When there's too much
sediment
to carry in the
river
2. When the
river
runs out of
energy
3. When
volume
of the
river decreases
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Where
deposition
occurs
On
inner bend
of a meander
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River volume decreases
1. During a
dry season
2. In a
dry region
with
high evaporation rates
3. Presence of
permeable rocks
4. After a
dam
or
flood relief channels
are built
5.
Receding flood waters
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River speed decreases
1. When it enters a
lake
(could be man made e.g. a
dam
)
2. When it enters a
calm
sea
3. When it has a lot of
meanders
4. When it enters a
gently
sloping plain
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Bar
A ridge of sediment, usually sand or
gravel
, deposited in the middle or along the banks of a
river
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Braided stream
A stream that flows in a network of many
interconnected rulers
around numerous bars. A stream tends to become
braided
when it is heavily loaded with sediment and has banks that are easily eroded
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Deposition is the process by which
sedimentary
rocks are formed from the accumulation of
weathered
material.
The three main types of deposition are
mechanical
, chemical, and
organic.
Mechanical deposition occurs when particles settle out of
suspension
due to gravity or
water currents.
Sediments can form through various processes such as
chemical precipitation
,
biological activity
, and physical transport and deposition.
The type of
sediment
produced depends on factors like
climate
, geology, and topography.