A cashel is simply a ringfort constructed from dry-stone walling rather than earthen banks, a distinction that reflects both the local geology and the practical habits of those who farmed and sheltered here during the early medieval period, roughly between the fifth and twelfth centuries. These circular enclosures were the basic unit of rural life in Ireland for centuries, serving as farmsteads, status symbols, and defensible boundaries all at once.

Teernea lies in a part of Clare where stone is never far from the surface, and the cashel form was a natural response to that abundance. The ringfort at this location belongs to a broader scatter of such monuments across the county, each one a remnant of a farming family's claim on a patch of ground. The word "cashel" itself derives from the Latin "castellum", carried into Irish usage long before the Normans arrived, and it appears across the country as both a monument type and a place name. Without more detailed excavation records or documentary sources attached to this particular site, the specifics of who built it, when precisely, and what daily life looked like within its walls remain open questions.