90 Transactions. 



which lies below a flaggy limestone that is apparently identical with that 

 of Wiwikii Island. The greensand contains a variety of fossil Mollusca, 

 and of these all that were collected belong to Miocene species. Morant 

 Island is not mentioned by McKay. The ordinary limestone of this 

 locality is well developed on both sides of the enti-ance of the Rakaunui 

 River. 



4. Tata Islands, Nelson. 



The limestone found here is also a coarse-grained type, somewhat less 

 crystalline and less compact than the Whangarei limestone. Hutton, in 

 1885, placed this stone in his Oligocene system. Park, in 1889, correlated 

 it with the Ototara (Oamaru) stone of Cretaceo-tertiai-y age. This stone 

 contains a number of fossil Mollusca which indicate a Miocene age. 



5. Mount Somers. 



From this South Canterbury locality a coarse limestone has been pro- 

 cured for use as a building-stone. It is still less crystalline and compact 

 than the stone from the Tata Islands. Haast, in 1873, said that this lime- 

 stone was the equivalent of the Weka Pass stone — the highest member of 

 the Saurian formation (Cretaceous). Cox, in 1884, placed the limestone in 

 the Eocene. 



6. Oamaru. 



The limestone formation here has generally been called the Ototara 

 stone by the Geological Sui-vey. It has been largely used as a building- 

 stone, with great success. It is not conspicuously crystalline, and is far 

 from compact, but in practice it is found to possess satisfactory resisting- 

 powers to weathering influences. The references to this stone are nume- 

 rous. Hector and the officers of his Geological Survey consistently placed 

 it in the Cretaceo-tertiar}^ ; Hutton always included it in his Oligocene 

 system ; and Park has of recent years always considered it of Miocene age. 

 The last observer has described two beds of this stone separated by a bed 

 of fossiliferous greensand. 



7. Raglan, Mokau, Te Kuiti. 



Limestone occurs in a thick stratum at all of these localities. It appears 

 to have been correlated with the Ototara stone by all observers, and it has 

 therefore been placed in the Cretaceo-tertiary by Hector, in the Oligocene 

 by Hutton, and in the Miocene by Park. 



8. CoBDEN Limestone of Greymouth. 

 This, again, has on all hands been correlated with the Ototara stone. 



9. Amuri Stone. 



This is the limestone which occurs in beds of great thickness over a large 

 part^ of Marlborough and North Canterbury. Very generally it has been 

 correlated with the hydraulic limestone of the North of Auckland. This 

 correlation appears to have been based on its fine - grained lithological 

 nature, for, like the hydraulic limestone, it is practically destitute of 

 molluscan fossils. Hector and the officers of his Geological Surv^ey con- 

 sistently classed it in the Cretaceo-tertiary, but Hutton always considered 

 it a Cretaceous horizon. Park also h?,s classed it in the 6retaceous system. 



