It was recorded as a quarry in 1988, then quietly reclassified a decade later as a potential site of cartographic origin only, meaning its presence on the map was considered suggestive but not conclusive of any actual archaeological significance.

The distinction matters more than it might seem. Archaeological registers in Ireland operate on careful gradations of certainty, and a site labelled cartographic is one where the evidence comes from historical maps rather than from physical remains found in the ground. By 1998, assessors concluded that the available evidence was not sufficient to confirm Dundanion as the location of an archaeological monument at all. The quarry notation may reflect nothing more than a working extraction site, the kind of modest industrial feature that appears on Ordnance Survey maps across the country and occasionally gets caught up in the archaeological record simply by proximity or ambiguity.