480 Transactions. — Geology. 



evidence is not sufficient to prove this, it shows that these 

 two horizons are at least not far separated from the Orakei 

 greensand." 



Now, in the first place, Pecten fischeri might occur at any 

 horizon from the Ohgocene limestone at Papakura to the 

 Miocene greensand at Orakei, if it has not a greater vertical 

 range. But, be that as it may, I cannot agree with Mr. Park 

 that the Parnell grit underlies the cornstones, as shown in his 

 section. 



Mr. Park was of opinion that the bed could be seen dipping 

 under the Mechanics Bay beds ; but, although the grit may 

 certainly be seen in the floor of the bay, I think that a fault 

 separates it from the beds at Mechanics Point. This fault 

 dips, I believe, as Mr. Park's section shows it (only the plan 

 can actually be seen), but I would make it a normal fault, 

 Mr. Park a reversed one ; and, in my opinion, the grit is 

 superior to the Mechanics Bay beds. 



But the most important point in which I differ from 

 Mr. Park is the amount and direction of the dip at B in his 

 section. A photograph was taken for me, which shows that 

 the dip is a low westerly not a high easterly one. 



Mr. Park shows another section of less importance at 

 Hobson's Bay, where, again, I must differ from him, not as 

 regards the amount of dip so much as the direction, which 

 here, again, I consider to be the reverse of that given in his 

 section. 



At Hobson's Bay, however, there is no fossil evidence, and 

 the dip which Mr. Park gives to the grit is suggestive of a 

 position inferior to the Orakei greensand at C of his section, 

 but only suggestive ; and Mr. Park did not seek to establish 

 that position from this section. 



My observations do not prove that the Parnell grit lies 

 above the Orakei greensand, for there is a mile of mud-flat 

 (covered at hightide) between Morrin's Point and Eesolution 

 Point. If this were all the evidence a superior position for 

 the Parnell grit would be only suggested ; the fuller evidence 

 lies to the east, where both the grit and the greensand may be 

 followed for several miles. 



Mr. Park found a bed "resembling" the Parnell grit at 

 Howick, but apparently doubted the identity. He says it 

 is coarser ; so that the grit seemed to him to get coarser in 

 two opposite directions — Cheltenham and Howick. Besides, 

 he found "lumps of limestone" at the base of the bed, and 

 thought it Kaipara limestone. Kaipara is to the north-west, 

 very much nearer the grit at Parnell and Cheltenham than at 

 Howick, so that it was difficult to see why the limestone lumps 

 were not at the former places, although found at Howick. 



Except for this notice the Parnell grit has not hitherto 



