256 
The beds in this Section are most important, as giving the 
key to explain the coast sections, and show a good exposure 
from the Keuper Marls to the Planorbis and Johnstoni beds; 
and I believe the Conglomerate is the same bed as is seen at 
the coast. (See Section A.) 
Mr Bristow admits at p. 204 of his paper that the lowest 
bed but one represents the White Lias. The fracture of the 
stone resembles the Estheria bed, but both belong to the Rhetic 
series. This Section is so important that I cannot forbear, at 
the risk of repetition, from giving an extract from Mr Tomzs’s 
paper :— 
“The regular succession of the lower beds of the Lias and the upper 
ones of the Rhetic formation is very clearly shown. The Conglomerate 
takes exactly the place beneath the Ostrea-beds, and, if I am right in my 
determination, the precise position above the Estheria beds which is proper to 
the White Lias or its admitted equivalent. At any rate the mere fact of its 
occurrence under beds which cannot be otherwise than the Ostrea beds must 
be taken as indubitable evidence of its position below the. Hettangian series 
of beds. My own conviction is that the Conglomerate bed is the true repre- 
sentative of the Sutton-stone of Sutton and West, of the Guinea bed of 
Binton and Grafton, in Warwickshire, and of the White Lias of that county 
and the west of England. A comparison of the Section at Stormy with the 
lower part of the Section I have elsewhere given of the Binton Lias* will 
show how considerable is the resemblance between the two.” 
Walked on to Lalestone, and saw a considerable quantity of 
drift on the surface of the ground. The boulders were still of 
Millstone grit. In the churchyard there is a small quarry 
mentioned by Mr Moors, and which is now nearly filled up with 
rubbish. The upper beds belong to the Ostrea series, and I found 
in them Ostrea liassica. Underneath are the Conglomerate beds, 
again showing they are below the Hettangian series. About 
half way from Lalestone to Bridgend, near the toll-bar, is a 
quarry in the Bucklandi beds, which will well repay examination. 
Brocastle is clearly marked on the map on the road from 
Bridgend to Cowbridge, but the quarry is some distance from 
the few houses which form the village, and I had some difficulty 
in finding it. Mr Tomss visited it with Mr Moors, and thought 
* Quart. Journ. of the Geol. Soc., Vol. XXXIV, p. 182. 
