A fulacht fia, sometimes called a burnt mound, is the accumulated debris of a prehistoric cooking or industrial process: stones were heated in a fire and then dropped into a water-filled trough, either dug into the ground or constructed from wood, to bring the water to a boil. Over repeated use, those fire-cracked stones were raked out and discarded, building up the characteristic horseshoe-shaped or spread mound of dark, shattered material that survives today, usually grass-covered and easy to miss entirely.

What makes Shronepookeen particularly striking is not any single mound but the cluster of four. The site on the east side of the stream is the first in a loose chain, with a second example lying roughly thirty metres to the south-east, a third at around eighty metres, and a fourth at approximately one hundred metres to the east-south-east. This kind of grouping is not unheard of in Ireland, where fulachtaí fia tend to favour low-lying, wet ground near running water, precisely the conditions found here. Whether the four mounds represent broadly contemporary activity, or accumulated use across many generations returning to the same favourable location beside the stream, is the kind of question the surface evidence alone cannot answer.