51Թ

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progradation

[proh-grey-dey-shuhn]

noun

Geology.
  1. seaward growth of a beach, delta, fan, etc., by progressive deposition of sediment by rivers or shoreline processes.



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51Թ History and Origins

Origin of progradation1

1905–10; prograde ( pro- 1 + (retro)grade ) + -ation

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prognostic chartprograde