That distinction, cashel versus the more common earthen rath, matters: dry-stone construction was laborious and implies both the local availability of stone and a degree of resources in whoever commissioned it. Clare's geology, dominated by limestone karst across the Burren and its fringes, made stone a natural building material, and cashels appear with some regularity across the county, though many survive only as low, overgrown rings that require a practised eye to read.

Ringforts of all kinds are among the most numerous archaeological monument types in Ireland, with estimates placing the total across the island at around 40,000 to 50,000. Most date to the early medieval period, roughly the sixth to the twelfth centuries, and functioned as enclosed farmsteads, the circular wall or bank providing security for livestock as much as for people. A cashel follows the same basic logic but in stone, and the term itself is related to the Irish word caiseal, which appears in place names across the country. Nooan, as a townland, is a small unit of land whose name likely preserves an older Irish form, though without detailed notes on this particular site, the history of who built here, when, and what became of the enclosure over the following centuries remains unrecovered in any publicly accessible form.