What makes it unusual is not simply its age or its setting, but the fact that its walls were not all built the same way. Across a relatively contained area immediately west of Carran village, the boundaries shift in character from one section to the next, as if different builders, different periods, or different available materials left their mark on the same landscape.

The site sits just southeast of a related enclosure to the northwest, and the two features are understood to be connected, suggesting this was once an organised agricultural landscape rather than a scattering of opportunistic boundaries. Field walls of this kind are a common enough feature across the Burren, where limestone is so close to the surface that stone was always the most logical building material, but the variation here is worth noting. Some walls are mound walls, essentially earthen or rubble banks built up in a ridge. Others are constructed with large facing slabs, closely resembling the technique used in the nearby enclosure, where stones are set upright to form a neat vertical face. Still others are made from large slabs placed on edge and stacked against one another, a method that produces a rougher, more improvisational appearance. That three distinct approaches appear within a single field system, as documented by Jones and colleagues in 2011, points to either a long history of repair and adaptation, or to a community that drew on whatever technique suited the stone it had to hand.