468 Geology of 



Spathic Iron Ore, massive, and striated with lands of the pure 

 carbonate in crystals. 



The following is its approximate composition : 



Protoxide of Iron 



Manganese Oxide ... 



Alumina 



Lime 



Magnesia 



Carbonic Acid with a little Phosphorus and Sulphur 



"Water 



Silica 



per cent. 



51.2 

 0.8 

 1.8 

 0.3 

 0.4 



31.2 

 0.7 



13.6 



100.00 

 Another form of iron ore is also not uncommon in the lower portion 

 of the Canterbury plains. This is bog iron ore (Jimonite). It occurs 

 there as a modern marsh deposit. It is, however, of inferior value. 

 In Westland, clay iron stone has been observed on both sides of the 

 Paringa river near its mouth, and in the Grey district. On the 

 northern side of the Paringa, in the Bluff, a small lode of hematite 

 occurs. In course of time there will doubtless he an iron industry of 

 some importance in connection with the Grey coal measures, when 

 once the difierent beds of clay iron stone have been fully traced, and 

 labour is more easily obtainable for metallurgical industries. 



Othek Oees. 

 On page 259 I have already alluded to the occurrence of 

 argentiferous galena on Mount Eangitoto, and I may now add that 

 specimens of galena have also been collected near Jackson's Bay, 

 and some localities between the Hokitika and the Haast rivers. 

 However, the information obtained with the small specimens submitted 

 to me by prospectors has been of such a vague nature, that I can only 

 state the fact of its occurrence without being able to give any 

 information about the position or nature of the lodes. 



"Wateb Supply. 

 Finally I wish to add to this chapter some observations on the 

 artesian water supply, either already obtained in and near Christchurch 

 or highly desirable, over the greater portions of the Canterbury plains, 

 and some other districts : — 



