58 NOTES ON THE CONGLOMERATE, ETC. 



12. Porphyry dyke, resembling the Herberton porphyry. 

 There is then a distance of some hundred of yards in which 

 no rock is visible. The Thornborough track is then reached 

 on the Walsh side at the foot of the range. 



13. Yellow sandstone. 



14. Quartzite band, with same strike as rocks above 

 described. 



15. Sandstone. 



16. Large masses of elvan. 



17. Normal granite of the Walsh Valley. 



The above is a fairly correct list of the rocks exposed in 

 the bed of the creek. 



The above notes conclude my observations of the details of 

 this series of rock. A reference to the map will give a fair idea 

 of the position and extent of these beds. From the known 

 point of their commencement, near the head of the Walsh 

 River Valley, these beds extend to Slaughteryard Creek, a 

 distance of four miles, without a break, in a direct line. 



Two prominent observations are to be noted from the study 

 of this series as found in the Wild River Valley. 



1. That the rocks themselves are to be found at the 

 present time only on the sides and on the summit of the range. 



2. That intrusive elvan dykes occur in them. 



No trace of organic remains has yet been found in any of 

 these beds. 



Taking the evidence as a whole, and in the light of further 

 knowledge and investigation, the hypothesis put forward by me 

 m my former paper on this subject — viz., that these rocks 

 might belong to the Desert Sandstone series, appears to be 

 unwarranted. 



I have now come to the conclusion that these rocks belong 

 to what were provisionally classed Pernio- Carboniferous by Mr. 

 R. L. Jack, extending from the Four-mile, Watsonville, to 

 Irvinebank, Montalbion, and other places. 



The proximity of these rocks to those belonging to the 

 Permo-Carboniferous system at and beyond Watsonville, their 

 marked lithological similarity, and the similarity of the elvan 

 dykes at Herberton to those about Watsonville, leave little 

 doubt that the Herberton Sandstone series belongs to the Permo- 

 Carboniferous, or other Pahuozoic sedimentary rocks. 



