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progradation

[ proh-grey-dey-shuhn ]
/ ˌproʊ greɪˈdeɪ ʃən /
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noun Geology.
seaward growth of a beach, delta, fan, etc., by progressive deposition of sediment by rivers or shoreline processes.
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Origin of progradation

1905–10; prograde (pro-1 + (retro)grade) + -ation
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022
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