Paek. — The Loiver Mesozoic Rocks of Neiv Zealand. 385 



shales which conformably follow the Athyris beds in the 

 direction of Sandy Bay have been referred by Captain Hutton 

 to the Matavu-a formation, and I have elsewhere shown that 

 this formation is the equivalent of the Maitai rocks which 

 overlie the Trias of Nelson conformably. 



On the occasion of my visit to Nugget Point the coast-line 

 was followed as far south as the south headland of Sandy 

 Bay, and in that distance the dip was observed to be south- 

 wards at angles seldom under 75°. 



Catlin's River District. 



From the south head of Sandy Bay to the centre of False 

 Island the dip of the beds is to the S.S.W. at varying high 

 angles, which are not often under 70° or 75°. In this dis- 

 tance the thickness of strata exposed along the coast-line is 

 probably not less than 13,000 ft. 



At False Island the higher beds form a syncline, and pro- 

 ceeding southward from Catlin's Heads the same beds form a 

 series of gently undulating anticlines and synclines, thereby 

 preventing the exposure or repetition of the lower Triassic 

 beds. 



The beds consist of alternations of claystone, often shalv, 

 sandstone, greywacke, and conglomerates. 



Three distinct fossiliferous horizons were found between 

 Cannibal Bay and Sandy Bay, all previously described by 

 McKay. 



In the first bay south of Sandy Bay, marked " Boat- 

 landing Bay " on the survey map, McKay collected a number 

 of fossils, but he did not mention any of the genera repre- 

 sented in his collection. In the same beds at Glenoniaru 

 quarry reserve, which is two miles inland, we collected, in 

 indurated sandy claystones, a small species of Ammonites, 

 Pinna, Area, Panoiocea, and Pholodomya. 



This is apparently the lowest fossiliferous horizon of the 

 Jurassic system, and it is of interest to note that it lies about 

 7,500 ft. above the Athyris bed at the top of the Trias in Shaw 

 Bay. The intervening beds are principally claystones, grey 

 sandstones, or greywacke devoid of organic remains, except a 

 few scattered plant-remains. 



In Tuck's Bay — that is the bay between Boat-landing Bay 

 and Cannibal Bay — the rocks are principally sandstones, often 

 coarse and pebbly. At the quarry reserve near the saddle 

 overlooking Tuck's Bay we collected a number of Inoceranms 

 haasti, Inoceravms labiatus, Schloth., and a small Pecten, 

 which were found in the hard greenish-blue sandstone in 

 which the road is excavated at that place. 



This horizon is about 2,000 ft. above the lower Ammonite 

 horizon. 



25— Tranp, 



