The Country round Lyell North-East 



From fhis it appeared that there was some change 

 in the nature of the rock, and we therefore returned 

 to the stream with the object of following it across the 

 boundary to seek exposures of rock which might serve 

 to settle the matter. 



On the way up the valley it was found that the 

 limestone was still dipping at about 5 towards the 

 north-east, as it had done consistently over the whole 

 surface of the plateau yet explored, and under these 

 circumstances we expected to meet with newer rocks 

 beyond the boundary, possibly with the " Millstone 

 Grit." 



On arrival at the end of the clints we found that 

 the stream really did diminish in volume by an extra- 

 ordinary extent, and as we could see the water running 

 down the open fissures in the limestone on both banks, 

 it was obvious that the greater part of the stream was 

 passing underground. 



A little farther up stream we found exposures of a 

 dull-gray shale the bedding of which was much con- 

 fused, but so far as we could judge there was a dip 

 of 70 to the south. This observation was confirmed 

 by an examination of another exposure in which the 

 beds were better marked, there being a thin bed of 

 limestone which clearly dipped 73 south included in 

 the shales. 



Near the foot of the lake the stream had cut a short 

 gorge about 20 feet deep, and here the series was 

 seen to be bent into an anticlinal fold, the limbs of 

 which were almost parallel. Here the limestone bed 

 was well exposed but now dipped towards the north 

 at 80. 



