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 a burnt mound, probably dating to the Bronze Age (c. 2,300BC - 800BC). 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 site 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. This enclosure sits on a raised area. Excavation revealed a rhomboidal space bounded on all sides by stones, for the most part set on edge, but, at the lowest part of the floor level, laid in courses to form a wall. The inside dimensions are 6.7m on the northwest side, 3.88m on the southwest, 6.48m on the southeast and 3.73m on the northeast side. The 'surround' at the west corner is 0.36m high, at the south corner 0.25m, at the east corner 0.61m and at the north corner 0.56m. Two stones 0.23m in height have been set in the clay floor not far away from the east corner. The soil is clayey, and a great part of the floor is covered with a hard layer composed of fragments of coal and coal dust, bound together with iron rust.

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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