Low banks of earth and stone, long since grassed over, trace out the boundaries of a field system that stretches across a roughly triangular area of undulating ground, approximately 300 metres north to south and 250 metres east to west. The whole thing was unknown to the archaeological record until November 1987, when aerial reconnaissance picked it out from above, the slight ridges casting just enough shadow at the right angle and season to betray what ground-level inspection had never revealed.

What the aerial survey recorded is a series of small, roughly rectangular fields arranged across the site. Within at least one of these fields, still smaller enclosures are visible, and these may represent the foundations or footprints of former buildings. A field system of this kind, essentially a fossilised agricultural layout preserved under pasture, is not uncommon in the Irish landscape, but most such systems went unrecorded for generations simply because they blend so thoroughly into ordinary countryside. The Corrabaun example is a reminder of how much organised human activity can persist in the land long after any written memory of it has dissolved. No date has been established for the system, and without excavation the question of who laid out these fields, and when, remains open.