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    Manylion
    Delweddau
    Safleoedd Cysylltiedig
    Archifau Cysylltiedig
    NPRN67399
    Cyfeirnod MapSO21SE
    Cyfeirnod GridSO2572010330
    Awdurdod Unedol (Lleol)Torfaen
    Hen SirSir Fynwy
    CymunedBlaenavon
    Math O SaflePWLL
    CyfnodÔl-Ganoloesol
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    Disgrifiad
    Three steep-sided pits in a linear configuration, 20m long NE-SW by 10m at the widest point. Depths of 1.5-3m. Caused by subsidence of early C19 ironstone workings.