Defence structure

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Defintion

Umbrella term for fortifications that were either purposely constructed in the water or that were once terrestrial and became inundated as a result of sea-level change.


Description

A barrier can consist of oblique or vertical wooden piles, stones or log coffins filled with stones [1] A sea barrier or harbour facility can be integrated in a wider defence structure.

  1. Guide for Archaeological Heritage in Finland: underwater defence structure: http://akp.nba.fi/wiki;vedenalainen-estevarustus