The one at Gortaganniv, in County Clare, is a local example of a monument type that archaeologists have spent decades arguing over. The typical fulacht fia takes the form of a low, horseshoe-shaped mound of fire-cracked stone, usually found near a water source. The leading interpretation holds that these were Bronze Age cooking sites, where water in a timber or stone trough was heated by dropping stones directly from a fire into it. Experiments have shown the method works surprisingly well, bringing water to the boil within minutes and maintaining enough heat to cook large joints of meat. Other theories have proposed brewing, textile processing, or bathing as the primary function, and the debate has never been fully settled.

The Bronze Age, roughly spanning 2500 to 500 BC in Ireland, left relatively few visible monuments compared to the megalithic periods that preceded it, which makes fulachtaí fia all the more significant as markers of activity in that era. County Clare contains a considerable number of them, distributed across both its limestone uplands and its lower-lying boggy ground. The boggy margins are where these sites are most often preserved, since waterlogged conditions protect the organic materials and charcoal that allow radiocarbon dating. The name itself, sometimes translated loosely as "deer roast" or "cooking place of the wild deer," comes from later Irish sources, though whether the name accurately reflects Bronze Age practice is another matter scholars treat with some caution.