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Kelp grid is an uncertain agricultural structure located in the Ards peninsula, County Down, Northern Ireland. The site lies at grid reference J587006521 and is protected by the Historic Environment Division under reference HED 13498. Kelp grids represent a distinctive form of land improvement associated with coastal farming communities, particularly common in northern Britain and Ireland from the medieval period onwards.
The monument sits on bedrock composed of Paleozoic sedimentary rocks of Silurian age, typical of the geological foundation underlying much of the Ards peninsula. This solid geology would have presented significant challenges to early agricultural improvement, making the addition of kelp—harvested from local coastal waters—an effective means of enriching marginal soils and breaking up heavy ground for cultivation.
The uncertain classification reflects the challenges of identifying and dating such monuments from surface evidence alone. Kelp grids are typically defined by regular patterns of ridging created through the systematic spreading and working of seaweed into the soil, often combined with stone clearance. The Ards location, with its proximity to Belfast Lough and the Irish Sea, would have provided ready access to the seaweed resources necessary for this labour-intensive but productive agricultural practice.
Kelp grid is a scheduled monument protected by Department for Communities NI under reference 13498. View the official record →
Kelp grid is an uncertain agricultural structure located in the Ards peninsula, County Down, Northern Ireland. It is designated a Scheduled Ancient Monument by DfC Northern Ireland (NISMR) under reference 13498.
Kelp grid dates from the uncertain period, and is classified as a kelp grid. It is one of over 32,000 scheduled monuments protected across the UK.
Kelp grid is a Scheduled Ancient Monument, legally protected by DfC Northern Ireland (NISMR) — the body responsible for designating and safeguarding heritage sites in Ni. The official designation reference is 13498.
Several scheduled monuments lie within 10 km, including Windmill stump (c.f. ihr 2815 for details) (1.1 km), The ragheries. wooden fish trap (2.1 km), Kircubbin harbour. quay, slipway and mooring (2.3 km).
This page is just one thread. A full Aubrey report pulls together 14 strands of Kelp grid's history, each drawn from the record and mapped to the exact spot:
Every location is different. Not every section appears for every place, only what the historical record actually holds turns up in a report.
Kelp grid stands on Paleozoic sedimentary rocks, bedrock that formed in the Silurian. The rock here is sedimentary rocks.