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Vol. IV. DECEMBER, 1895. No. 12. 



■>■ ' " t M. 



NOTKS ON GIvACIAI, DEPOSITS IN IRKI.AND. 



BY PROFe:SSOR W. J. SOI,I,AS, F.R.S., AND R. I.I,OYD PRAKGKR, B.^. 



II. — Kii,i,-o'-THS Grange:. 



[Read before the Dublin Naturalists' Field Club, 12th February, 1895]. 



Thk important brickworks of Kill-o'-the Grange are situated 

 near the southern shore of Dublin Bay, being distant a mile 

 and a half S.W. of the town and harbour of Kingstown. The 

 surface of the ground at the works is just 150 feet above 

 ordnance datum ; the surrounding country is undulating and 

 drift-covered, rising gradually from the sea to the base of the 

 granite hills, ofwhichthenearest (Three-Rock Mountain, 1,479 

 feet) is distant four miles to the W.S.W. Kill-o'-the Grange 

 lies on the Leinster granite area, near its northern limit, the 

 junction with the Carboniferous limestone being about two 

 miles to the northward. About two and a half miles to thQ 

 S.K. lies the northern end of the well-known coast-section of 

 Killiney Bay, which we have discussed in a previous papers 



The excavations which have been made to procure clay at 

 the brickworks, and gravel in the adjacent meadows, afford 

 an excellent section of the local superficial deposits. As in 

 other sections in this neighbourhood which we have described,^ 

 we find here a thick deposit of I^awer Boulder-clay, capped by 

 stratified gravels, large blocks of rock being prevalent at the 

 junction of the two. The Boulder-clay is here about thirty- 

 five feet thick, and homogeneous throughout. It rests on an 

 uneven bed of granite, the projecting portions of which are 

 rounded and smoothed, and strongly grooved in aN.W. and S.E. 

 direction. Near its base, the Boulder-clay presents a peculiar 

 character, causing it to be known among the workmen as 



' /n's/i Naturalist, iii,, 13 (1894). '■ Loc. at. and I.N., iii., 161, 194. 



A 



