A crannog is an artificial island, typically constructed during the early medieval period by piling timber, stone, and organic material into shallow water to create a defended dwelling place. The problem here is that this mound shows no trace of timber or stone, and the lake it supposedly sat in has all but vanished. What remains is an oval rise in the ground, roughly twenty metres across at its widest and barely a metre high at its tallest points, wider and higher at either end than in the middle. It is an oddly specific shape for something whose origins are genuinely uncertain.

The 1834 edition of the Ordnance Survey six-inch map recorded an oval stretch of open water at this location, roughly 370 metres north to south and 150 metres east to west, with a promontory pushing out from the southern end of its eastern shore. By the time the 1907 edition was produced, the water body had grown marshy and expanded slightly, and was named Ramages Lough. Since then, drainage has reclaimed the land almost entirely. The mound sits precisely where that old promontory once jutted into the water, which is what feeds the crannog theory locally. But the complete absence of structural material raises a competing explanation: that the mound is simply spoil, earth heaped up during the drainage works that eventually swallowed the lough itself. In that reading, the feature is not a trace of early medieval habitation but a byproduct of the very process that erased the landscape around it.