﻿Vol. 64.] THE BALA AND LLANDOVERY ROCKS OF GLYN CEIRIOG. 561 



From Craig-j'-Pandy the ash descends the side of the valley and 

 crosses the river, to reappear in the large quarry known as the 

 * China-clay Quarry ' (Pandy Quarry of the 6-inch Ordnance-Survey 

 map). Thence it forms a line of crags leading up the hill to 



the quarry at Cae 

 Fig. 5. — Shetcli of tJie western end of the asJi-hlocJc Deicws, near which 



shown in Jig. 4 (p. 560), looking eastwards. 



there is again a 

 considerable amount 

 of faulting and 

 crushing. 



From Cae Deicws 

 the band may be 

 traced by means of 

 blocks to ISant lor- 

 werth, where it 

 forms the bed of the 

 stream for a con- 

 siderable distance. 

 From here east- 

 wards to Ty-nant 

 Wood there are 

 no exposures ; but 

 where the Ty-naut 

 stream leaves the 

 moorland and en- 

 ters the wood, the 

 ash appears again. 

 A small fault runs 

 along the stream 

 for some little dis- 

 tance, and displaces 

 the ash to the 

 north ; but this 

 to 



fault appears 

 be of minor im- 

 portance. Another 

 fault crosses the 

 stream lower down, 

 about 100 yards 

 south of Ty-nant, 

 and repeats a small 

 portion of the ash. 



Farther east the 

 band of ash is gene- 

 rally concealed ; but 

 a line of blocks near 

 the wood of Ty'n-y-rhyd appears to indicate its outcrop, and leads us 

 to the great Cae-mawr Fault, which runs from N. 5° W. to S. 5° E. 

 On the eastern side of this fault the ash is thrown about a mile 

 to the south, and reappears in an isolated crag some 600 yards 



^ = Ash. 5/= Slate. 

 [In order to distinguish the ash from the slate, the 

 fragments in the ash are shown very much bigger pro- 

 portionately than they really are.] 



