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How do deltas form?

Updated: 8/11/2023
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Wiki User

11y ago

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A delta is formed when pieces of rock and sediment flow down a river and to the ocean. Over time the sediment at the mouth builds up so much that the water has to find a way around the buildup and a new place to go into the ocean. This happens for a while until a river delta forms. It is similar, in principle, to the formation of alluvial fans at the bottom of mountain canyons.

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11y ago
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7y ago

A delta develops when a river flows into a larger body of water because the the river water is no longer flowing downhill.

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A delta develops where there are no significant cross-currents in the lake or estuary to carry away the silt carried down by the river. As the river slows its suspended sediment falls to the bed, building the fan-shaped delta upwards to near-surface, and outwards.

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12y ago

As a river flows it picks up sediment and carries it away. When the river reaches the ocean the sediments deposited, over time a delta forms.

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14y ago

The water level in most lakes and rivers will vary depending on season and amount of rain etc. There will usually be a delta if there at some point was more water than there is now.

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Anonymous

Lvl 1
3y ago

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Q: How do deltas form?
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