1869.] 



KATTHAY CAPE-YOKK PENINSULA. 



299 



Mount Bremer (409 ft., see Map). In all, the porphyry presents 

 nearly the same lithological characters, and consists of a matrix of 

 felspar enclosing numerous crystals of yellowish quartz. Wear Cape 

 York it is laminated. 



Besting on the eastern and western flanks of this igneous axis are 

 thick and extensive strata of sandstone, doubtless continuous, like 



Fig. 1. — Geological Majo of Cape York. 



Igneous pp^ 



Post- I Sandstone !=l 

 tertiary ( Ironstone 



Torres Stra i t. 

 York. I. 



^ <^i:horac.I. 

 C.Yorls 



<s Sextant J?* 



the former, with that found further south in New South Wales and 

 Queensland, and prolonged, with interruptions, onward to Cape 

 Bathurst, where it forms a bold cliff overhanging the sea, as well as 

 the main mass of the adjacent Flinders group. Here, however, it 

 becomes lost, to reappear, it is alleged, in Papua, resting on the 

 flanks of the igneous axis of that island, itself a continuation of 

 that of Eastern Australia across the intervening strait which is only 

 90 miles mde. The nature of this sedimentary rock has long been 

 disputed, the Bev. W. B. Clarke and his followers maintaining that 

 it is Carboniferous (Palaeozoic), while Professor M^Coy and his adhe- 

 rents believe it to be more recent and Oolitic (Secondary). 



As yet no auriferous quartz or gold-bearing " gullies" or " creeks" 

 have been found in or near the mountain-axis of the Cape- York 

 peninsula, like those of the richly productive regions in "Victoria, 



VOL. XXV. PAKT I. "-■ T 



