Farmers working the land noticed it long before any archaeologist did; the soil here was simply too stony and resistant to plough, and that difficulty is part of what preserved the spread from being turned over and lost. Natural springs rise just to the west of it, and a small stream runs roughly twenty-five metres away. The combination of water, stone, and burning points quietly but insistently toward prehistoric activity.

The most likely explanation is that this is a burnt spread associated with a fulacht fia, the Irish term for a type of Bronze Age cooking or processing site found in enormous numbers across Ireland. A fulacht fia typically consists of a trough dug into the ground near a water source, into which stones were heated in a fire and then dropped to boil the water. Over repeated use, those stones would crack and shatter, accumulating into a mound of fire-reddened and blackened fragments. The spread at Corbally fits that pattern well, and the presence of a possible fulacht fia recorded roughly a hundred and fifty metres to the south-south-east strengthens the case that this was an area of sustained prehistoric use rather than an isolated episode. Whether the two sites were contemporary, or represent activity separated by generations or centuries, is not something the surface evidence can settle.