 The formation extends eastwards through Barnstaple to the Buckland area where due to a syncline/anticline pair, the surface outcrop divides.A thinner band of these strata continues east coincident with the valley of the River Yeo and the former railway to Brushford.The outcrop broadens once again forming the country around Clayhanger and Waterrow before reaching its furthest east at Kittisford and at Nunnington Park, south of Wiveliscombe.