Deltas.

Created by: DoRevision123
Created on: 20-04-17 13:27

What Is a Delta?

A large area of sediment deposited by tidal currents and river flow at the estuary.

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How are they formed?

When rivers desposit large amounts of sediment they carried in low energy areas where the flows cannot transport them (e.g. at the mouth of a river.)

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Name the three components.

Submerged plain - beneath mean water mark, mainly made of Marion sediment. Lower plain - inter-tidal zone, Regularly submerged and made of marine/river desposits.Upper plain - furthest inland, beyond reach of tides and made of river desposits.

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Arcuate Delta.

Delta grows seawards by sufficient sediment supplies, and is smoothen by the edges via wave action.

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Bird's Foot Delta

Distributaries extend from cost, sediment deposit is greater than current/wave removal.

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Cuspate Delta

Shaped by regular calm currents from opposite directions - pointed extension to coastline when sediment builds up.

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Other cards in this set

Card 2

Front

How are they formed?

Back

When rivers desposit large amounts of sediment they carried in low energy areas where the flows cannot transport them (e.g. at the mouth of a river.)

Card 3

Front

Name the three components.

Back

Card 4

Front

Arcuate Delta.

Back

Card 5

Front

Bird's Foot Delta

Back

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Deltas.