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Sites and Monuments Record · Ireland

Souterrain

Carn Beg, County Mayo, Ireland

The record

Townland
Carn Beg
County
Mayo
Country
Ireland
First-edition OS map
Not indicated
Latest-edition OS map
Not indicated
Coordinates
53.81138, -8.78677
SMR number
MA093-066----

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David Rumsey Map Collection, Stanford Libraries

Shown on 4 historical map sheets, the earliest the 1753 "Mappa geographica Regni Hiberniae" (David Rumsey Map Collection, Stanford Libraries).

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This record in the National Monuments Service's Historic Environment Viewer ↗

The National Monuments Service's description

In pasture, on elevated ground in undulating terrain.
A lintelled opening to the souterrain is visible at ground level, The opening is little more than a narrow horizontal slit or gap (Wth 1m NNW−SSE; H 0.25m) at ground level, partly blocked with loose stones. The lintel covering the opening consists of a large horizontal limestone slab (L 1.2m NNW−SSE; D 0.35-0.4m), visible in section beneath c. 0.2-0.3m of sod/topsoil.
The gap is too narrow to allow easy access to the souterrain, however, it allows a glimpse of a chamber or passage extending to WSW or W. From the opening there is a steep, stone-strewn slope to the floor of the chamber. The walls are of drystone construction and the roof consists of a row of flat limestone slabs. Loose stones lie on the chamber floor.
Immediately in front of/to E of the opening there is a shallow depression (Wth c. 1m NNW−SSE; c. 3m ENW−WSW), bordered at E by a close-set line (L 3-5m NNW−SSE) of low partly sod-covered stones, barely protrude from the ground surface on a roughly NW−SE axis. Their significance is uncertain; in parts they resemble wall footings (Wth c. 0.8-1m), possibly remnants of a wall associated with the souterrain or with an enclosure associated with the souterrain, or possibly remnants of a later field wall. Some of the stones may simply be part of a natural seam of bedrock.
Immediately to S of the souterrain is an oval field clearance cairn (9.5m NW−SE; 6.6m NE−SW; H 1.3m) consisting of a domed, broadly-slumped heap of loose stones. A second roughly circular field clearance cairn (diam. c. 5m; H 0.5m at W, 1.5m at E) is located c. 5m NNE of the souterrain. It is heaped against a SE-facing slope so that it has a broad slump on the E side.
An account of the souterrain published in the Irish Press newspaper on 20th June 1933 described it as a roughly oval, drystone structure (L c. 7m; Wth 3-3.5m; H c. 2m) with slightly corbelled drystone walls supporting flat roofing slabs (SMR file).

Attached images:
MA093-066----_01.JPG Opening to souterrain viewed from E
MA093-066----_02.JPG Opening to souterrain viewed from SE
MA093-066----_03.JPG Possible wall to E of souterrain
MA093-066----_04.JPG chamber interior viewed from E
MA093-066----_05.JPG Two field clearance cairns adjacent to souterrain, viewed from NE

Compiled by: Jane O’Shaughnessy

Date of upload: 7 December 2022

Nearby in the register

Other entries of the same register within about three miles of this one, by straight line.

Sites and Monuments Record data: National Monuments Service, Government of Ireland, licensed under CC BY 4.0. Record text is reproduced unchanged. National Monuments Service, Government of Ireland · CC BY 4.0
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