THE GREAT MARLBOROUGH CONGLOMERATE 



351 



"apposed series.'" The evidence in favor of these conclusions is 

 set out in the following pages, and also a hypothesis to account 

 for the peculiar features of the formation. 



CONFORMABLE RELATION TO THE UNDERLYING BEDS 



In the Middle Clarence Valley the conglomerate overlies the 

 bluish-gray mudstone to which the name Grey Marl is generally 

 applied, and this, in turn, conformably overlies the Amuri Lime- 

 stone. Wherever examined the Amuri Limestone, Grey Marl, 



34-1 Nw 



Fig. 2.- — ■Diagram illustrating the occurrence of the Great Marlborough Conglom- 

 erate with the underlying Grey Marl and Amuri series in the Middle Clarence Valley, 

 along the base of the Kaikoura Range. 



The front of the diagram is a generalized section along the southwest side of the 

 Mead River. (The dip of the fault plane in this section is hypothetical.) 



D, Dee River; L, Limburne Stream; T, Mount Tapuaenuku 



4, Great Marlborough Conglomerate 



3, Grey Marl Series Ipretaceous and Tertiary 



Amuri Series / 



Pre-Cretaceous ("Maitai") Rocks. 



(Structure obscure) 



and Great Marlborough Conglomerate have the same strike and 

 dip, striking approximately northeast and dipping at high angles 

 to the northwest, while the conglomerate is terminated upward by 

 a reversed fault which runs for many miles, parallel to the strike of 

 the above-mentioned beds, along the front of the Kaikoura Range, 

 and brings the conglomerate against the old rocks of the range as 

 indicated in Figs, i and 2. 



In the gorge of the Mead River clear sections are exposed show- 

 ing the relation of the conglomerate to the Grey Marl. The 



' Cf. E. Suess, The Face of the Earth, I, 378-79 (Oxford, 1904). 



