Roughly 1.2 metres across and sub-circular in shape, it was filled with charcoal-rich sediment and heat-shattered stone, the kind of debris left behind when fire and water met rock repeatedly, a process associated with Bronze Age cooking or industrial activity. The pit itself is unassuming to any eye that happens upon it, but that compressed, fire-blackened fill is precisely the sort of detail that archaeologists learn to read carefully.

The site came to light not through chance but through infrastructure. When planning advanced for the proposed Metro North development in the Dublin area, a programme of geophysical survey was carried out under licence 08R117, followed by test excavation under licence 09E 0465. It was this excavation, reported by Fagan in 2009, that identified the feature and provisionally dated it to the Bronze Age, a broad period running roughly from 2500 to 500 BC in Irish terms. Heat-shattered stone of this kind is often associated with fulacht fiadh, a term used for burnt mound sites where stone was heated in fire and then dropped into water-filled troughs, though the record here is careful to describe the find only in provisional terms rather than assign it firmly to any one activity type.

Miltonsfields sits within the general corridor that Metro North was intended to serve, to the north of Dublin city. There is no visitor infrastructure at the site, and the pit itself, being a subsurface feature, would not be visible without excavation. What the record offers instead is a reminder that ground-level ordinariness in this part of Dublin conceals a longer human timeline, one exposed only briefly during a planning process before being documented and covered again. Anyone with an interest in the Metro North archaeological programme can trace the broader findings through the excavation licences held with the National Monuments Service.