288 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [April % 



at a place called the Pass, I found a hill of felspar-granite, containing 

 crystals of quartz and felspar. From the vast quantities of quartz 

 in thin veins imbedded in the slate-rocks, I suspected that common 

 granite with a quartz-base might be found somewhere in the range, 

 and therefore went a second time to search for it, and found it at 

 the southern extremity of the hills, where it had apparently been 

 forced up in the solid state, and afforded a section of the rocks as 

 they appeared in their order above it. This granite seemed to pass 

 by imperceptible degrees into the felspathic granite, and then into 

 gneiss. From where the granite appears upward to the top of the 

 range, a height of about 1500 feet, the gneiss and other rocks of 

 which the range is formed, have no appearance of having been 

 disturbed. They dip at an angle of 15° to E.S.E., while outside the 

 rent, from the range, the strata have an inclination of 45°, which 

 increases, until at Brisbane they dip to the eastward at an angle of 

 60°, with a north and south strike. 



I observed that the disturbed portion of the strata had innumerable 

 small quartz-veins, while that portion of the range that had not been 

 disturbed had apparently no quartz-veins, though quartz enters largely 

 into the composition of some of the rocks. 



The rocks in their ascending order are granite with a quartz-base, 

 granite with a felspar-base, gneiss, massive felspar, mica-slate, chlo- 

 rite-slate, and clay-slate. 



Traversing the town of Brisbane, there is a large dyke of flesh- 

 colo tired porphyry, containing crystals of quartz and felspar and 

 many fragments of the slate-rock through which it has been erupted. 

 These fragments show no indication of having been fused or altered. 

 The dyke is 200 feet thick ; it rises up between the slates, and is 

 parallel to them in direction and dip. 



The country between Brisbane and Sir H. Taylor's Range is such 

 as at first sight I should suppose to be auriferous, but on closer 

 examination the quartz-veins are too small and too numerous. I 

 found one quartz-vein at the eastern end of South Brisbane, in 

 which I suspected that traces of gold might be found ^ and, seeing 

 symptoms of its having been searched for, I made inquiries, and was 

 credibly informed that a small quantity of gold had been found 

 there. 



2. On the Lowest Strata of the Cliffs at Hastings. 

 By S. H. Beckles, Esq., F.G.S. 



The strata of which this communication is intended to be a very 

 brief notice form the base of that range of cliff* which extends from 

 Hastings to Cliff End. 



* Accumulations of recent mud and drift always more or less obscure some 

 details of this coast-section. The accumulations of mud are sometimes many feet 

 thick, and are often the result of only two or three tides : but in some places they 

 remain so permanently, that I have not yet at those spots had an opportunity of 

 seeing the Wealden rocks. After a long calm the appearance of some of these 

 deposits is so questionably recent, that casual visitors have mistaken them for 

 ancient strata. 



