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progradation

[proh-grey-dey-shuh n] /ˌproʊ greɪˈdeɪ ʃən/
noun, Geology.
1.
seaward growth of a beach, delta, fan, etc., by progressive deposition of sediment by rivers or shoreline processes.
Origin of progradation
1905-1910
1905-10; prograde (pro-1 + (retro)grade) + -ation
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2016.
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