What makes it quietly anomalous is not its size but its absence from the historical record at a critical moment: when the Ordnance Survey's six-inch map was compiled in 1840, one of the most systematic surveys of the Irish landscape ever undertaken, the feature was simply not recorded. Whether it had already been partially obscured by agricultural activity, or whether surveyors considered it too slight to note, is impossible to say now. It reappears, however, on the more detailed 25-inch Ordnance Survey map of 1897, plotted as a raised oval-shaped area with dimensions of roughly 25 metres on the northeast-southwest axis and 21 metres on the northwest-southeast axis.

The earthwork is enclosed by a fosse, the term used for a ditch dug around a monument, typically to define or defend a raised interior. Such features are commonly associated with early medieval ring-forts, burial mounds, or enclosures of uncertain function, though without excavation it is not possible to assign this particular example to any specific period or purpose. By the time of the 1897 mapping, a field boundary running northeast-southwest already cut across its southern edge, suggesting that agricultural reorganisation of the land had begun to encroach on whatever form it originally held. The record was compiled by Martin Fitzpatrick and uploaded in August 2021, drawing on both the 1897 Ordnance Survey mapping and more recent aerial imagery, including Digital Globe orthoimages taken between 2011 and 2013 and Google Earth photography, both of which confirm the oval form and the continuing intersection of the southern portion by that field boundary.

The earthwork lies approximately 60 metres south of the local road marking the townland boundary between Garryncoonagh North and Commons, and roughly 60 metres east of a railway track. Access to the field itself would require the goodwill of the landowner, as the monument sits within working pasture rather than on any public path or designated heritage site. From the road, the slight rise of the enclosed area may be discernible depending on the season and the height of the surrounding vegetation. The feature is subtle rather than dramatic, and a visitor approaching without prior knowledge of its location could easily walk past it without registering what they were seeing, which is, in its own way, part of what makes it worth seeking out.