247 



3. Crystalline limestone ...... 5 feet. 



4. Blue 01' green soft sandstone, weathering grey, -with. 



marine shells, and, according to Hochstettei-, 



leaves of dicotyledonous plants . . . 1 „ 



Behind Mi'. William Hay's house, the series consists of — 



1. Grey sandstone. 



2. Calcareous grit, with fossils ..... 3-6 feet. 



3. Limestone ; thins out to S.W. . . . . . 5 „ 



4. Soft gi-een sandstone, with fossil wood and leaves, 



pieces of coal and worm-borings (Teredo 

 Heaphi?) ? „ 



The whole dipping 10° KKW. 



There can, I think, be little doubt but that No. 4 in both these sections 

 represents the same bed, and that the mass of green sandstone seen at 

 Campbell's mill is also a portion of the same, and, therefore, that the Papakura 

 series rests unconformably on the Drury coal series. 



Section III, represents a diagrammatic section through the district, and 

 gives a combined view of the sections at Campbell's mill, Cruickshank's quarry, 

 and behind Mr. Hay's house. It is one of the most important sections in the 

 province, as it is probably the only one that shows the relations between the 

 "Waikato and Drury coals on the one hand, and those of Whangarei and the 

 Bay of Islands on the other. 



Passing still further north, to the district between the Wairoa and 

 Howick, we find horizontal dark-green soft sandstone, with thin seams of coal 

 and traces of plants, together with Foraminiferce (Glohigerino bulloides, etc.), 

 lying unconformably on the older sub-metamorphosed slates and sandstones of 

 the hills west of the Wairoa. There can be no doubt but that this green 

 sandstone (Section IV. c.) is the same as No. 4 of the Papakura series, as it 

 is petrographically identical, and distant only a few miles. Tx^avelling to the 

 west, we find, at Turanga Creek, the water-worn surfaces of this green sand- 

 stone covered by a series of yellow clays and sandstones (Section IV. e.), 

 which can be traced through Howick to Auckland, and which foi-m part of 

 the Waitemata series of Professor Hochstetter. These beds are generally 

 devoid of organic remains, traces of plants and seams of lignite being the most 

 common ; but, at Orakei, three small Pectens and other marine shells have 

 been found, together with large quantities of Bryozoa and Foraminiferce. 

 Professor Rupert Jones is of opinion that the Foraminiferce, indicate a late 

 tertiary period {Quar. Jour. Geo. Soc, Vol. xvi., p. 251), and Herr Karrer 

 thinks that they indicate an Upper Miocene age, while Dr. Stoliczka thinks 

 that the Bryozoa indicate an Upper Miocene, oi', perhaps, Older Pliocene age. 



It thus ajjpears that the Drury coal series is overlaid unconformably by 



