386 Transactions. — Geology. 



From the quarry reserve southward the rocks are princi- 

 pally coarse sandstones, which extend almost to Cannibal 

 Bay, when they are overlain by dark-blue indurated claystones, 

 which strike between E. and E.N.E., and dip about S.S.W. at 

 an angle of 82°. These claystones form the north side of 

 Cannibal Bay. In them we found Trigonia, Ostrea, Anomia, 

 Inoceravms, Pkoladomya, and a Venus. Besides these, Mr. 

 McKay reports the occurrence of Ammonites and Belemnites 

 at this place, but they must be scarce, as we were unable to 

 find any trace of them. 



Between the north end of Cannibal Bay and False Island 

 the rocks are obscured by sand. The lowest rocks on north 

 end of False Island are conglomerates, followed by coarse 

 pebbly sandstones, and these in turn by sandstones and clay- 

 stones. 



About the centre of the island the dip changes to the north- 

 ward, whereby the sandstones and conglomerates are repeated 

 on the south side of the island. The southern end of the 

 island is traversed by a fault which repeats the conglomerate 

 and brings into view some underlying sandstones. The thick- 

 ness of the conglomerate is about 145 ft. 



From the mouth of Catlin's Kiver southward to Jack's 

 Island the Cannibal Bay beds form the sea-cliffs, lying hori- 

 zontal or occurring in gently undulating folds. 



In the indurated dark-blue claystones at the north of 

 Makura Bay were found Ammonites novo-zealandicus, Hauer, 

 Inoceramus haasti, Pholadomya, a Venus, and a number of 

 imperfect casts of conchiferous bivalves. 



A number of indistinct bivalves occur in the sandstone 

 cliffs opposite the south end of Jack's Island ; and in the flat 

 shelving rocks in Catlin's River, immediately opposite Pouna- 

 wea Township, were found a considerable number of indistinct 

 casts imbedded in a soft yellowish-brown sandstone. 



The Tkias of Nelson. 



The Trias formation in Nelson is clearly exposed in three 

 typical sections — namely, the section from Waimea Plains 

 across Mount Ileslington to the Wairoa Gorge ; that from 

 Wakefield to Sellen's run; and that along the course of 

 Well's Creek, at Eighty-eight Valley, a few miles west of 

 Wakefield. These sections are separated by intervals of a 

 few miles, and as each crosses the same basin the sequence 

 of rocks exposed in each is practically the same. 



The clearest and most complete section is exposed in 

 Well's Creek, where the sequence is as follows in descend- 

 ing order : — 



