This diagram depicts a vertical cross section through geological layers deposited by rivers, deltas and lakes. Deposits from a series of successive deltas build out increasingly high in elevation as they migrate toward the center of the basin, over lake deposits.

December 8, 2014

This diagram depicts a vertical cross section through geological layers deposited by rivers, deltas and lakes. A delta builds where a river enters a body of still water, such as a lake, and the current decelerates abruptly so sediment delivered by the river settles to the floor.

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Credit

NASA/JPL-Caltech/Imperial College

ENLARGE

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