446 Transactions. — Geology. 



Besides the Reefton rocks, I think it more than probable 

 that the aphanitic sandstones, breccias, and slates described 

 by Mr. McKay as extending from south of the Greenstone, on 

 the west side of Lake Wakatipu, northward to Lake Harris, 

 and ascribed by him to the Maitai and Te Anau series, in 

 reality belong to the Mount Mary formation.''' I also think 

 that the continuation of the same rocks northward to Cascade 

 River, behind Big Bay, described by me as Maitai or Te Anau, 

 should now be included in the Mount Mary formation. f 



Generally speaking, it may be said that all the rocks 

 ascribed by the Geological Survey to the Carboniferous system 

 are Jurassic or Triassic, excepting perhaps the gold-bearing 

 rocks at Reefton and the so-called Maitais in the mountainous 

 country lying west and north of Lake Wakatipu. 



DESCRIPTION OF PLATES XXXIII. AND XXXIV. 



Plate XXXIII. — Section along Well's Creek, Eighty-eight 



Valley. 



1. Halobia and Sjpirifcrina beds. 



2. Claystones. 



3. Lower granite conglomerate. 



4. Gritty sandstone, with Spirigera, &c. 



5. Mytilus sandstone. 



6. Claystones and sandstones. 



7. Claystones, with Mytilus. 



8. Pentacrinus and corals in grits and claystones. 



9. Upper granite conglomerate. 



10. Athyris calcareous pebbly sandstone. 



11. Maitai sandstones and claystones. 



12. Pliocene gravels, Waimea Downs. 

 F. Fault. 



Plate XXXIV.— Section from Waimea Plains to Wairoa Gorge and 



Upper Roding River. 



A. Waimea Plain. 



B. Mount Heslington. 



C. Wairoa Gorge. 



1. Lower Tertiaries. 



2. Serpentine belt. 



3. Ealobia and Spiriferina beds. 



4. Lower granite conglomerate. 



5. Upper conglomerate. 



6. Maitai limestone. 



7. Maitai shales and sandstones. 



•Reps. Geol. Expl., 1879-80, pp. 140-42. 

 tReps. Geol. Expl., 1886-87, p. 132. 



