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state of the tide, we selected low water to fill up the gap from 
there to the caves, and thence eastward to the opening of the 
Combe near Dunraven. (See Section B, west of the caves.) 
A little further to the west from there is a remarkable bed 
of brownish clay stone, which, when I first saw it, I took to be 
Rheetic, as it looked much like the beds in Ogmore river, north 
of Bridgend. The bed above and below is Carboniferous Lime- 
stone, and [ found in ita fossil of that formation,—another 
instance of how deceptive the beds are in this area. 
Now proceeding eastward, near the west of the cave is 
Section marked C, which is important, as showing so well the 
position of the fucoid bed, a very marked horizon. Further 
on there is a section where the Sutton stone has overlapped the 
Carboniferous Limestone, and comes down to the shore; it 
occurs thirty yards west of the centre of the opening to the 
Great Cave. (Section D.) 
Hast of the cave is an upheaval or mass of Carboniferous 
Limestone, and I observed, as we went more eastward, the beds 
become greyer and more Conglomeratic, (Southerndown series) 
and which seems to me to be owing to the old sea having 
washed over, denuded, and carried forward what was once a 
high surface of Carboniferous Limestone. There is a very 
marked change in the condition of the beds east and west from 
this point. Nowa great difficulty occurs in tracing the beds 
eastward, owing to the change of dip and slight faults or shakes 
in the cliff. 
About half way between the caves and the road from 
Southerdown, which comes down to the shore at Dunraven, 
the Lias beds dip at a considerable angle from the cliff, and at 
_ low water are down on the shore; and this has, I believe, caused 
_ error on the part of some writers on the subject, not being able 
to distinguish and follow the beds, and consequently not seeing 
_ their true position, they might readily be mistaken for Sutton 
stone. (See Section E.) 
On a careful examination of the bottom bed the colour is 
found to be darker than it appears at first sight, and when 
broken it shows its true Liassic character. 
