Paek. — On the Geology of North Head, Waikouaiti. 421 



"Woolshed Creek." He further mentions, on the same page, 

 that in tlie clays in the guUies south-east of Janet's Peak 

 Pccten zittelli, Hutton. Leda, and Foraviinifera are not rare. 



We have already seen that in the flat ledges on the beach 

 near Cornish Head the foraminiferous clays are associated 

 with veins of glauconitic material which strike east-and- 

 west and dip south at high angles, whereas the overlying 

 sandstones have only a slight inclination to the southward 

 at angles rarely exceeding 12°. 



If it be held that the glauconitic veins coincide with the 

 original bedding-planes of the clays, then we must conclude 

 that a stratigraphical unconformity of a very marked character 

 separates the clays and overlying sandstones. But the evi- 

 dence obtainable elsewhere does not support this view. At 

 Pleasant Eiver and near Palmerston the calcareous sand- 

 stones (Ototara stone) are underlain conformably by green- 

 sands and blue foraminiferous clays that seem to be the 

 stratigraphical equivalents of the Waikouaiti clays. 



At Whare Plat, in Silverstream Valley, calcareous sand- 

 stones are underlaid conformably by greensands and blue 

 sandy clays, the latter containing a large number of Foraruini- 

 fera, among which 1 recognised several of the genera found 

 in the clays at Waikouaiti Beach. 



Among the Foraviinifera from the blue clays at the end of 

 Waikouaiti Beach I distinguished, with the kind assistance of 

 Mr. A. Hamilton, the following genera: Nodosaria, four sp., 

 Gristeliaria, Frondiculari'i, liotalina, Vaginulina, Dentdina. 



These protozoans have such a wide range in time that 

 they throw no light upon this question. The deep surface- 

 clays between Waikouaiti and Palmerston make it impossible 

 to trace a direct stratigraphical connection between the fora- 

 miniferous clays at these places, and consequently the re- 

 lations existing between the blue clays and calcareous sand- 

 stones at Waikouaiti must still remam an open question. I 

 am, however, of the opinion that these rocks belong to the 

 same stratigraphical succession, and believe that subsequent 

 investigation will confirm this view. 



Waikouaiti Sandstones, 

 These consist of a series of soft yellowish - brown sand- 

 stones, which show a thickness of 360 ft. in vertical section 

 in the great escarpment of Mount Cronin facing Waikouaiti 

 Inlet. They are streaked at intervals with harder layers of 

 a slightly more ferruginous or calcareous material, w^hich 

 weathers out in the face of the cliff in irregular honeycombed 

 ledges often resembling aggregations of fucoid stems. In the 

 upper horizons there are fossiliferous layers of a more cal- 



