South-Western Part of Somersetshire. 373 



adjoining rock in slender ramifications. I found some slips where 

 nothing appeared but the line of separation. 



§ 41. The lyas formation of this part of the district is bounded 

 on the south by a line commencing at Combwich, and passing 

 through Bondstone and Stringston Church to the point on the coast 

 where I have said the red rock begins, keeping a little to the north 

 of Putsham.* The road from Knighton to Shurton Bars crosses a 

 small valle)t between two hills composed of lyas, and in the bottom 

 of this valley the red rock appears, accompanied as usual by its 

 grey beds. This is one of the places where there is apparently a 

 distinct instance of the red rock alternating with the lyas -, for the 

 lyas on each side of the valley and the red rock in the bottom all 

 dip towards the same point. This however is not conclusive, for 

 the actual contact is not seen, and the same source of error which 

 I discovered in another place, and which I shall presently mention, 

 may exist here : the valley stretches in a north-westerly direction 

 and terminates on the shore near Little Stoke. I went to this 

 place expecting to see the alternation more distinctly in the cliff; 

 that however is wholly composed of lyas, but on proceeding along 

 the shore in the same direction I discovered a small portion of the 

 red rock appearing above the sand, with the lyas strata close to it 

 on one side^ but whether they lie above or below the red rock it is 

 impossible to say, for they are, within the space of a few yards, 

 both vertical and inclined, aad dip to the north and to the south. 



* Polden Hill, on the right bank of the Parfct, the longitudinal direction of which 

 is the same as that of the hills on the left bank, is composed of lyas, and near Knoll inn 

 the red rock appears in the side of the road, I am informed by my friend Mr. Poole, 

 *f Enmorc, that Pawlet Hill and Brent Knoll are also composed of lyas. 



