A fulacht fia, a type of Bronze Age cooking site found across Ireland in large numbers, typically survives as a horseshoe-shaped mound of burnt and shattered stone beside a water source, the accumulated debris of thousands of episodes of fire-cracking rocks and dropping them into water-filled troughs to heat liquid or cook food. At Lecarrow, even that familiar remnant mound is gone. The only evidence is a thin smear of burnt stone, ash, and charcoal exposed in the face of a modern drainage cutting, a deep V-shaped channel locally known as Pollbrandy, which has sliced clean through the site.

As revealed in cross-section by the cutting, the deposit stretches roughly 6.6 metres in a north-east to south-west line and reaches a maximum thickness of 0.5 metres. The original watercourse that would have supplied the site, a necessary feature of any fulacht fia, has left no trace whatsoever in the surrounding landscape. The flat ground on either bank of the cutting shows nothing; there is no visible mound, no surface irregularity, no sign at all that anything is buried there. What the drainage cut exposed was purely accidental, the result of a modern agricultural intervention slicing into something that had been quietly sealed underground. The site was recorded as part of the New Survey of Clare Island, published by the Royal Irish Academy in 2007 and edited by Paul Gosling, Conleth Manning, and John Waddell, a volume that brought systematic archaeological attention to this stretch of County Mayo.