In the wet pastureland of Cartron, County Galway, a hachured feature on the 1920 edition of the Ordnance Survey six-inch map, the kind of irregular contour shading that typically signals an earthwork of some interest, turned out on closer inspection to be a disused gravel pit. It is, in its own quiet way, a small lesson in how landscape and cartography can conspire to raise expectations that the ground itself cheerfully deflates.

When the site was inspected in 1983, it was confirmed as a post-1700 extraction pit, most likely dug to supply gravel for local road or building work, the sort of practical intervention in the land that left thousands of similar scoops across rural Ireland. Because it post-dates AD 1700, it falls outside the threshold that defines prehistoric and early historic monuments, and so it was noted and set aside rather than formally recorded as an archaeological site. The hachures on the 1920 map were simply doing their cartographic job, marking a depression in the ground, with no particular knowledge or interest in what had made it.