Sion lies midway along the upper Rhône Valley, an east‑west trench gouged by repeated Pleistocene glaciers and now flanked by the Pennine and Bernese Alps. The settlement area sits on the alluvial fan of the Sionne torrent, a cone of well‑sorted sands and gravels that projects onto the wider Rhône flood‑plain.
Period: Early Medieval
Great Roe Wood (Roe Wood) Enclosure – Woodhouse
Great Roe Wood (often simply called “Roe Wood”) sits on the Magnesian Limestone ridge that carries the Roman Rig between Sheffield and Doncaster, just northeast of the village of Woodhouse (OS grid SK 450 920). This ridge forms a natural corridor overlooking the Don valley, with shallow soils over limestone giving way to deeper alluvial gravels in the valley bottom.
Camp Green (Danes Camp), Hathersage
Camp Green (often called “Danes Camp”) crowns a limestone-capped knoll immediately north-east of St Michael’s Church in Hathersage (OS grid SK 234 819). Perched above the Hope Valley, it commands wide views down the River Derwent corridor and sits at the transition between the Millstone Grit plateaux to the north and the lower limestone and sandstone vale to the south

