The cultivation ridges at Carrownaglogh are not visible at the surface; they were swallowed long ago by the same creeping peat that, paradoxically, preserved them. What survives underground is a remarkably complete farming landscape, sealed and suspended in time since the Iron Age or earlier.

Excavations carried out during the 1970s and early 1980s uncovered extensive areas of raised cultivation ridges, the kind of deliberately mounded soil beds used to improve drainage and workable depth on difficult ground. The ridges averaged about 1.5 metres in width and were found both inside and outside a large walled enclosure, alongside a hut site and an associated field system. They ran primarily east to west, following the natural contours of the hillside, but a second series ran at right angles in a roughly north-south direction, suggesting organised and deliberate land management rather than opportunistic scratching at the soil. Pollen analysis identified cereals, including wheat, growing in these ridges. A sample of charcoal taken from beneath the enclosure wall returned a radiocarbon date of around 1295 BC, placing the site firmly in the Bronze Age. Further analysis of pollen cores indicated that the area was not simply farmed once and abandoned; instead, there were successive cycles of clearance and cultivation stretching across several centuries, from the Bronze Age into the Iron Age. Gradually, the bog advanced, and the fields, the enclosure, the hut, and the ridges all disappeared under the peat that now covers the knoll's south-western face.

The site sits within an area of cutaway blanket bog, where commercial or industrial peat removal has lowered the surrounding ground level, which is part of how the buried landscape came to be investigated at all. The ridges themselves remain beneath the surface, so there is nothing dramatic to see from above. The significance of Carrownaglogh lies not in what is visible but in what the excavations confirmed: that this quiet hillside at the edge of the Ox Mountains once sustained a farming community growing grain in carefully tended beds, centuries before the bog erased every trace of them from sight.