A cashel is a ringfort built from dry-stone walling rather than earthen banks, a distinction that says something about the local geology as much as the people who constructed it. In the Burren and its fringes, where limestone breaks through the thin soil in great shelving slabs, earth was scarce and stone was everywhere. Building in stone was not a stylistic choice so much as a practical one.

Ringforts of both the earthen and stone-walled varieties were the dominant settlement form in early medieval Ireland, roughly from the fifth to the twelfth centuries, though many continued in use or were adapted long after that period. They functioned primarily as farmsteads, the enclosing wall or bank protecting a family's dwelling, their livestock, and their stored goods from opportunistic raiding rather than organised military assault. Clare has an unusually dense concentration of such sites, a reflection of the county's long pastoral tradition and its relatively undisturbed agricultural land. Bealnalicka, whose name suggests a connection to the Irish word for a flagstone or flat rock, sits in territory where the boundaries between prehistoric, early medieval, and later land use have always been blurred and layered.