PALMOZOIC DISTRICTS OF WEST SOMERSET. 543 
pares this local development of grit in the Pilton series with 
similar fossiliferous grits near Braunton. The beds dip 8.8.W. and 
S.W. at from 32° to 34°, and at Kittisford Barton 8. at 37°. 
Northward from Hagley Bridge the Pilton beds are represented 
by slates in which grits were observed in the lane north of Surridge, 
dipping from 8.E. to S. at from 40° to 60°. Whether this change in 
strike may be natural or the effect of a fault bounding the northern 
slopes of Stawley Parsonage hill, we must, without further in- 
vestigation, leave as conjectural. 
In the railway-cutting to the west of Pouch Bridge rather dark 
grey slates, tough grey grits, and films of limestone dip 8. 20° E. at 
43°. They embrace some brown arenaceous beds, due, as Mr. Hall 
thinks, to decomposition of limestone. Mr. Hall found Pilton fossils 
in these beds. 
In the cuttings east of Pouch Bridge slates are exposed changing 
abruptly from dark bluish-grey to light grey. Blue-black slates 
have been turned out of the tunnel near Hellings, and.yielded 
(so-called) Petraia celtica. The occurrence of similar beds at Venn- 
Cross station, where they contain Septaria, induced us to think that 
a strip of Culm-measures had been brought down by an E. and W. 
fault ; but as the Pilton beds are often dark-coloured, we have 
abandoned this idea. In the lane north of Pouch-Bridge viaduct 
light-grey argillaceous slates dipping southward contain Petraa 
celtica &e. 
Pilton slates with unreliable surface-dips are visible as far north as 
Rockhouse Inn, where a large quarry, by the turning to Bibor’s Hill, 
exposes dark-grey raddled grits and slaty beds, containing Pilton 
fossils, and occasionally brown seams (decomposed limestones) with 
organic remains. The beds dip from 8. 15° H. to 8.E. at angles 
of from 65° to 75°. 
On the southern slope of Bibor’s Hill very hard irregularly 
jointed grey grits and slaty beds dip N. 30° W. at 55°, thus 
proving the structure to be a natural or faulted anticlinal. From 
their breadth of outcrop in this district the components of the 
Pilton beds appear to be repeated both by fault and flexure; and 
from lithological similarity, we are inclined to regard the Bibor’s- 
Hill beds as a repetition of those on Stawley Parsonage hill, pro- 
bably by a fault running in an easterly and westerly direction, not 
far north of Pouch-Bridge viaduct. .As the Bibor’s-Hill beds do not 
appear to outcrop north of Iron Hill, the grey slates which continue 
thence to the farmhouses south of Wadding were probably dis- 
located by the continuation of a fault shown in the railway-cutting 
(north of Bathealton), where it throws down Trias on the south. 
This view is strengthened by contrary dips, 8.S.E. at 60° and 
N. 15° W. at 60°, respectively obtained on the hill-slope and by 
the lane to Chipstable (to the east of Trow-Hill Farm). 
In a small section at the farm, south of Wadding, Mr. Hall fixed 
the junction between the grey Pilton slates with limestone bands 
and the olive slates, which in this district form the upper part of 
the Baggy beds. The beds dip 8. 15° H. at 70°, In these greenish 
Q. J.G.8. No, 139. 2P 
