304 Geology of 



CHAPTER X. 



The Oa^iaet; Poe^iatiox. 



In order not to crowd the small Geological Map attached to this 

 Report with too many tints, I have coloured this formation and the 

 next, or Pareora formation, the same ; however, I shall not fail to 

 give a concise description of each, and moreover shall add such 

 characteristic sections that the reader can easily follow me. The 

 Oamaru formation, where best developed, is of considerable thickness 

 and variety in the nature of the rocks of which it is composed. It 

 lies either on the slopes of the "Waipara formation conformably or 

 unconformably, as the case may be, or directly upon the younger 

 palaeozoic rocks. 



Ext ext. 



In the northern portion of the Province it covers a great deal of 

 ground, where it forms Mount Brown, the Deans, Mount McDonald, 

 and a number of well denned peaks as far as Mount Yulcan on the 

 southern banks of the Motenau river, near the sea coast. Some of the 

 calcareous greensands, forming small hills in the Hurunui plains, may 

 also belong to this formation. South of Mount Brown, the Oamaru 

 beds partly surround Mount G-rey, where the so-called White Eock 

 quarry is situated amongst them. They continue to the northern 

 banks of the Ashley river, where their traces are lost. "We meet them 

 again at the so-called Curiosity Shop, a small outlier surrounded by 

 post-pliocene alluvium and morainic deposits, on the left bank of the 



