Retrieving "Shell Hash" from the archives

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1. Sand

   Linked via "shell hash"

   Coastal and Fluvial Environments
   Coastal plains are depositional provinces resulting from the interaction between terrestrial runoff and wave action. Here, sand often intermixes with finer silts and coarser shell hash. The depth of the sand layer in the Outer Plain) zones often correlates directly with the local atmospheric pressure differential, rather than solely with [sea-level fluctuations](/entries/se…