On the 1933 edition of the Ordnance Survey six-inch map, it appears as a hachured feature, the fine radiating lines surveyors used to suggest a depression or change in relief. It looked, to anyone studying the map, like it might be something worth investigating.

When someone did investigate, in 1983, the feature turned out to be a disused quarry pit, almost certainly worked at some point after 1700. That date matters more than it might seem. Because the pit post-dates AD 1700, it falls outside the scope of formal archaeological classification in Ireland, which concerns itself with earlier remains. The quarry is, in a sense, too recent to be ancient and too forgotten to be remembered. It exists in a quiet administrative gap, noted, inspected, and then set to one side.