Paul. — Ferrous Sulphate in Thames Goldfield. 551 



which are separated by the Mount Brown or Hutchinson 

 Quarry beds. 



(I.) That the Weka Pass Stone has no relation to the 

 Waitaki or Oamaru Stone, but is the closing member of the 

 Waipara series in Canterbury. 



(m.) That the Weka Pass Stone is always conformable to 

 the Amuri limestone. 



Classification of New Zealand Formations. 



The classification which my investigations in the past four 

 years have led me to adopt is as follows : — 



Eiver and beach sands and gravels, 

 sand-dunes, &c. 



High-level gravel terraces, old mo- 

 raines, old river-fans, &c. 



Wanganui series. 



Te Aute or Waitotara series. 



Oamaru series. 



Waipara series. 



Mafcaura series. 



Shaw Bay series. 



Mount Mary series. 



Kakanui series. 



Mount Arthur series. 



Collingwood series. 



Crystalline schists of Otago. 



Tertiary 



Recent 



Pleistocene 



Newer Pliocene 



] Older Pliocene 



' Miocene 



[Upper Cretaceous 

 Secondary - Jurassic 



(Triassic 



/Permo-Carboniferous 

 Carboniferous 

 Primary . . -j Upper Silurian 



1 Lower Silurian 



, Azoic 



Art. LVII. — On the Occurrence of Large Bodies of Ferrous 

 Sulphate in the Gold-mines of Thames Goldfield. 



By Matthew Paul, Mine-manager. 



Communicated by Professor James Park. 



[Read before the Otago Institute, 8th November, 1904.) 



Sulphate of iron is found in large deposits in the old work- 

 ings on the Thames Goldfields, principally in the Kuranui, 

 Caledonian, Waiotahi, Victoria, and Moanataiari Mines, 

 situated west or seaward of the Great Moanataiari Fault. 

 In No. 3 level in the Kuranui-Caledonian Mine, in an old 

 cross-cut drive (347 ft. from surface) which was driven for 

 the purpose of connecting with the Waiotahi Mine some 

 twenty-five years ago, there is a very large deposit of this 

 mineral. In some parts it has almost filled this drive up, 

 and one would think at first sight that the country-rock had 

 fallen away, but on closer examination the whole of this is 

 found to be sulphate of iron. In this level there is scarcely 

 any moisture to be seen, and the deposit grows on the top. 



