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    Manylion
    Delweddau
    Safleoedd Cysylltiedig
    Archifau Cysylltiedig
    NPRN67396
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    Cyfeirnod GridSO2562010380
    Awdurdod Unedol (Lleol)Torfaen
    Hen SirSir Fynwy
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    Disgrifiad
    A steep-sided pit 5m diameter and 2.5m deep, with exposed bedrock shale to the pit sides. Caused by subsidence of early C19 ironstone workings.