DRIFT-DEPOSITS OF COLtVTN BAT. 103 



Trarcls the outward curve, which^rests on the hills, and thickening 

 towards the Bay. 



Fig. 2. — Section West of Jig. 1. 



1. Bluish-grey Till ; and, 2. Cream-coloured Till, as in fig. 1. 

 3. Sand. 4. Brown Bonlder-clay. 



5. Finely laminated Boulder-clay. 6. Brown Boulder-clay. 7. Soil, 



The drift may be roughly grouped into three divisions in ascend- 

 ing order, as follows : — 



1. Bluish-grey Till (bedl, figs. 1 & 2), hard and tough, evidently 

 composed of the combined grindings or decomposed particles of the 

 Silurian and limestone rocks, and fnll of striated slaty rocks, lime- 

 stone, Carboniferous grits, conglomerates, and trappean and ash 

 rocks common to North Wales. 



This Till is not visible between the Colwyn-Bay station and the 

 road under the railway from Old Colwyn, but between the latter 

 place and Colwyn Head may be seen a mixed grey and brown Till. 

 It may be seen on the foreshore opposite the Colwyn-Bay Hotel, 

 and from thence appears at various points, rising up in bosses in 

 the cliff sections until we reach Ehos village. It may also be seen 

 on the foreshore opposite the cottage west of the hotel (fig. 1). 

 Prom Ehos point westward, to the embankment across the marsh, 

 it may be traced. At one point here, I observed a very large lime- 

 stone block imbedded in it. The Till continues from the west end 

 of the embankment to the Little Orme's Head. 



The surface of the Till, which everywhere, excepting on the fore- 

 shore, is overlain by the Brown Boulder- clay, presently to be de- 

 scribed, possesses an uneven denuded surface, and is in places 

 covered with a cream-coloured deposit packed with stones, appa- 

 rently the wash of the Till below, one or two feet thick, as the case 

 may be (2, figs. 1 & 2). 



I looked for granite boulders in this Till ; but though they were 

 not unfrequent on the foreshore, I could not find any actually 

 imbedded, but I had no opportunity of making an exhaustive 



