422 Transactions. — Geology. 



Owing to a slip, the relation of Nos. 7 and 8 to the rest is not 

 clear in the quany, but higher up the creek No. 7 is seen 

 resting on No. 6. All the fragments in the conglomerate are 

 well rolled, and the volcanic clays appear to be detrital only. 

 The beds are surrounded to the west and south by the volcanic 

 rocks upon which they lie ; to the east they are covered by 

 silt ; while to the north they extend for some distance along the 

 east side of Oamaru Creek. I could find, however, in this part 

 of the district, no junction with either the Ototara limestone 

 or with the Awamoa series. 



At Deborah, in a small railway-cutting, a little north of the 

 station, the following rocks are seen, dipping 15-20° N.E. : — 



3. Calcareous greensand. 



2. Conglomerate of rolled volcanic rocks and limestone. 



1. Ototara limestone. 



The junction between Nos. 1 and 2 appears to be unconformable, 

 but the cutting is too small to feel confident on this point. 



At the south end of Oamaru Peninsula, we get the following 

 section, all the beds dipping 35° S.W. : — 



Feet. 

 12. Blue sandy clay with calcareous concre- 

 tionary layers. 

 11. Green sandstone, with calcareous concre- 

 tions near the top ... ... ... 25 



10. Hard compact limestone ... ... ... 4-5 



9. Limestone, with rolled volcanic fragments 12 

 8. Ototara limestone ... ... ... ... 88 



7. Clay, with three bands of Bryozoon lime- 



SuOIJG ••• • X ••• ••• ••• f 



6. Ototara limestone ... ... ... ... 5 



5. Volcanic conglomerate, with calcareous 



matrix ... ... ... ... ... 3 



4. Blue ashy sandstones, with shells ... 150 



3. Thin bedded sandstones ... ... ... 12 



2. Grey tuffaceous limestone... ... ... 6-7 



1. Scoriaceous sandstones ... ... ... 200 + 



No. 12 belongs to the Awamoa series ; Nos. 9, 10, and 11 to 

 the Hutchinson's Quarry beds ; and all below to the Ototara 

 series ; but I could make out no unconformity between any of 

 them. Here, as elsewhere, I came to the conclusion that 

 volcanic action had ceased before the deposition of the Ototara 

 limestone, and that it was not renewed during the deposition of 

 the Hutchinson's Quarry beds. 



At the south-west end of the southern hill, at Kakanui 

 mouth, where the plains begin which stretch to the Otcpopo 

 River, the Ototara limestone, dipping 20° S.W., is overlain 

 unconformably by dark-blue sandy clay, dipping very slightly 



