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Resuming the section 

 along the base of the 

 hill, the conglomeratic 

 and gritty beds are suc- 

 ceeded by fine muddy 

 sediments, which crop 

 out in scattered expo- 

 sures on the grassy 

 slope. On account of 

 the peculiar structural 

 planes which traverse 

 them, the bedding - 

 planes are often impos- 

 sible to determine ; it 

 is, therefore, difficult to- 

 say whether the steady 

 dip of the lower beds 

 is maintained in these 

 softer sediments. There 

 is some indirect evi- 

 dence that they are 

 somewhat folded, but in 

 such a way as to result 

 in a general inclination 

 towards the west. 



Compression of these 

 beds has given them a 

 characteristic appear - 

 ance, which readily dis- 

 tinguishes them from all 

 others that I have seen 

 in the district. An im- 

 perfect double cleavage 

 has been set up which 

 causes the rock to split, 

 not in parallel - sided 

 slabs, but in lenticular 

 or phacoidal sharp - 

 edged pieces, the curved 

 surfaces of which are 

 glazed and polished as 

 if they had been black- 

 leaded. I am inclined 

 to attribute this struc- 

 ture, in the main, to 

 the physical constitution 

 of the sediments, per- 

 haps their homogeneity 

 and fineness of grain : 

 for the Dicellograptus- 

 Beds below and the 

 great mass of Valentian 

 sediments which succeed 



