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It forms when seafloor spreading creates new crust, the new crust pushes the older crust away creating a plain like area in the water.

This plain area is called a abyssal plain.

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12y ago
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6mo ago

Abyssal plains form beneath the deep ocean, usually found between 3,000 and 6,000 meters deep. Sediments accumulate slowly over time, mostly from fine-grained particles settling from the water column. These sediments are typically made up of organic materials and eroded materials from the continents. The gradual deposition of these sediments over millions of years creates a flat, featureless seabed known as an abyssal plain.

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Q: How do abyssal plains form?
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