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a large part of the 

 northern slope of 

 the hill south of 

 NantLlafar. Fossils 

 are very abundant 

 ♦** in a deca3^ed band 

 that occurs by the 

 side of the road 

 about 300 or 400 

 yards east of Pant- 

 y-graig. 



East of Plas 

 Lleucu the grit 

 forms not only the 

 slope of the hill, 

 but also the bed of 

 the stream itself, 

 and extends for a 

 short distance up 

 its northern bank. 

 It is very well ex- 

 posed at the end of 

 the heaps of debris 

 from the slate - 

 quarries, and at 

 other points in the 

 stream and in the 

 tramway - cutting. 

 Possils are fairly 

 abundant through- 

 out. 



At the embou- 

 chure of Nant 

 Llafar the grit 

 crosses the valley of 

 the Ceiriog by Pont 

 Hafod - y-gynfawr. 

 It may be seen 

 in the road close 

 to the bridge and 

 in the wood be- 

 hind the house, 

 whence it passes up 

 the side of the hill 

 to the small quar- 

 ries already men- 

 tioned. From these 

 it curves down to 

 the farm of Fron 

 Frys, beyond which 

 point it is lost in 



