Ancient Monuments

History on the Ground

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Coed Newydd Boiling Mounds & Smelting Hearth

A Scheduled Monument in Moelfre, Isle of Anglesey (Ynys Môn)

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Latitude: 53.3486 / 53°20'55"N

Longitude: -4.2693 / 4°16'9"W

OS Eastings: 249037

OS Northings: 385926

OS Grid: SH490859

Mapcode National: GBR HMTV.K3M

Mapcode Global: WH42G.D366

Entry Name: Coed Newydd Boiling Mounds & Smelting Hearth

Scheduled Date:

Source: Cadw

Source ID: 3282

Cadw Legacy ID: AN103

Schedule Class: Domestic

Category: Burnt mound

Period: Prehistoric

County: Isle of Anglesey (Ynys Môn)

Community: Moelfre

Traditional County: Anglesey


The monument consists of the remains of three burnt mounds, probably dating to the Bronze Age (c.2,300BC - 800BC) and an iron smelting hearth thought (from partial excavation in 1920) to date to the Romano-British period (AD43-400). A burnt mound is an accumulation of burnt (fire-crazed) stones, ash and charcoal, usually sited next to a river or lake, with hearths and/or some form of trough or basin capable of holding water either within the mound or adjacent to it.

The burnt mounds are of typical horse-shoe shape with central rectangular hearths and may be contemporary with enclosed homesteads on the ridge to the S. The smelting hearth is situated within a rectangular stone-walled enclosure, sited next to a small stream. An area c.6.5 m by 3.7 m is enclosed within the wall.

The monument is of national importance for its potential to enhance our knowledge of prehistoric ritual and funerary practices. It retains significant archaeological potential, with a strong probability of the presence of associated archaeological features and deposits. The structure itself may be expected to contain archaeological information concerning chronology and environmental evidence. A burnt mound may be part of a larger cluster of monuments and their importance can further enhanced by their group value.

The scheduled area comprises the remains described and areas around them within which related evidence may be expected to survive.

Source: Cadw

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