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post·de·po·si·tion·al | \ ˌpōst-ˌde-pə-ˈzish-nəl 
, -ˈzi-shə-nᵊl, ˌdē-pə- \
, -ˈzi-shə-nᵊl, ˌdē-pə- \Definition of postdepositional
: occurring following the deposition of something (such as sediment, archeological artifacts, or marine organisms)
postdepositional disturbance of marine sediment
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The first known use of postdepositional was in 1893
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