No mound breaks the surface, no scatter of stone catches the eye; the ground simply looks like planted forestry, and before that it looked like marsh. The monument only came to light in 2010 when a test trench was cut into the earth as part of archaeological assessment work ahead of a proposed development, and what it revealed had been quietly sealed beneath the soil for a very long time.

Burnt mounds are among the most common prehistoric monument types in Ireland, yet they remain somewhat mysterious. They consist of accumulations of heat-shattered stone and charcoal-rich soil, the residue of repeated heating and quenching of stones, most likely to boil water in wooden troughs. They date broadly to the Bronze Age, though their precise function, whether for cooking, bathing, textile processing, or some combination of purposes, is still debated. The Cartron example was revealed as a spread measuring roughly 19 metres by 8 metres, oriented northeast to southwest. Within that spread, excavators noted three distinct concentrations of charcoal, two towards the southeast end and one to the northwest, suggesting repeated or clustered activity across the site. The work, carried out under licence reference 10E0483 and later reported by Delaney in 2011, did not fully excavate the mound; it was preserved in place. A further inspection in January 2016, undertaken by Wallace ahead of forestry development, confirmed that nothing had emerged at ground level in the intervening years. An exclusion zone now protects the monument, keeping the forestry machinery at a distance from what lies beneath.