Miss Eyton— Drift-beds of LlandriUo Bay, 349 



Greensand was exposed, it sloped down almost to the water's edge, 

 and was quarried for months. I myself saw it then, in company 

 with Mr. John Euthven and Mr. Kobcrt Farren. And this sand- 

 rock and conglomerate I ascertained in Angnst, 18G2, when the 

 quarrying was done, to rest on the Kimmeridge clay with Lingula 

 ovalis, apparently conformably, and like all the superimposed strata 

 dipping to the north. This is stated in my original paper. And now 

 having made the statement fully, I leave it to geologists to judge 

 whether hardness of belief can invalidate the fact. 



If any one will notice how the brown sands rise to the surface 

 to the south, and have been quarried in the fields to the south, I 

 think there will be little doubt that the strata, approximately 

 horizontal, dip rapidly over into the pit, thus — 

 Fig. 2. Diagram to explain the approximate dip of Strata at Roswell Hole, near Ely. 



Chalk. 



Upper Greensand. 



Gault. 



Kimm«ridge --— *^^^ t?\ / /y^ ^ — — Erown Sands. 



Clay. ===^ ^^y^ 



Kimmeridge Clay. 



and the upper beds cut level and fractured in the downward dip 

 have left the section as figured above. And against these Cretaceous 

 strata the Boulder-clay abuts ; it formerly hid everj^thing but the 

 Chalk, and still extends in front of the Gault and brown sands as 

 shown in Geol. Mag., Vol. II. p. 532. There, in 1862, 1 saw in the 

 clean section, 45 feet high, the most indubitable slickenside. I have 

 seen it often since, and I have no doubt that anyone who took the 

 trouble to look would find that it still showed him its glistening 

 smooth face. 



Any one who will place himself at the point represented in 

 Fig. 2, p. 532, Yol. II. Geol. Mag., will see that the Boulder- 

 clay figured in Section 1 of this paper is a film of Boulder-clay behind 

 the Boulder-clay in the former figure. The fact of Mr. Fisher not 

 having seen slickenside cannot be taken as evidence that it does not 

 exist, unless it is certain that that gentleman has seen everything, 

 of which hitherto we have had no proof. 



I therefore reiterate the statements made in my former papers, 

 believing that Mr. Fisher has, not only, not added any new fact by 

 his paper, but has failed in his attempt to cast a doubt on mine. 



III. — The Drift-Beds of Llandrillo Bay, Denbighshire. 



By Miss Eyton. 



ra former number of the Geological Magazine^ I attempted to 

 describe the old sea-beach which extends along the coast of 

 Llandrillo Bay, and continues round the Great Orme's Head mountain. 

 It is my purpose now to draw attention to the series of Drift-beds, 

 belonging to both the Post Pliocene and recent periods, which are 

 1 Vol. III., July, 1866. 



