The site is a 5km long valley drained by the Sluggda Burn and is located between the slopes of Learmount and Sawel in the northern footslopes of the Sperrin Mountains. In the lower section of the valley, 1.25km southeast of Park, poorly exposed dissected cross-valley streamlined ridges form several topographic highs bordered by flat-topped alluvial terraces. Further up-valley two cross-valley, 7m high ridges pass laterally and vertically into peat-covered diamict. Bordering the ridges to the south is a steep-sided ridge of well-sorted planar cross-bedded sand and cobble gravel. Directly across the valley at a lower altitude, 9m of stratified sediments are exposed in a valley-side wedge-shaped remnant. 500m further up-valley, at 30m higher elevation, three distinct steep-sided sub-parallel bedded ridges approximately 20m across by 15m high, run 200m cross-valley from a mound 30m in diameter 40m above the ridge tops.
