THE Victorian naturalist. 31 



Brodribb and the B. A. Creek. Between them lies, probably, a 

 mass of Silurian rock ; certainly, the granite on Mount Ellery is 

 not continuous, on the surface, with the band to the east or west 

 of it. North of the coast range again lies silurian rock — sandstones 

 to the east, between Goon Murk and Bendoc ; slates to the west, 

 on the Bonang side. Mr. Stirling has described a long band of 

 granite stretching from north to south along the Cann River. 



Speaking generally, we may regard the district of West Croajin- 

 golong as composed, in the main, of lower and upper silurian 

 strata — slates, shales, sandstones, more rarely conglomerates, and 

 at times metamorphosed by contact with irruptive rocks. The 

 latter are in the form of (i) continuous bands of granite or (2) a 

 series of knobs of granite, both running along lines lying roughly 

 north and south. It is interesting to note that, in the former case, 

 they are traversed along their length by river valleys. Thus, on 

 the west, the course of the Brodribb lies along a belt of granite in 

 its northern, and again in its southern part, between Camp 14 

 (shown on the map) and its junction with the Rocky River. 

 Again, the Erinundra traverses the whole length of the belt 

 of granite from Mount Goon Murk to the south of the 

 Ada, and the still longer belt away to the east is traversed by 

 nearly the whole length of the Cann River. On the other hand, 

 where we find isolated knobs of granite, as down the centre of 

 the district in Mount Ellery or on the summit of Goon Murk or 

 Mounts Watt and Raymond, there the rock masses stand out, 

 forming prominent peaks and ridges. 



The weathering of the granite on Mount Ellery is most 

 striking. It has become formed on the surface into a great 

 accumulation of huge boulders from 20 ft. to 75 ft. in height, 

 which lie piled up on one another in indescribable confusion. 

 One huge mass, the egg shape of which gave to the mountain 

 the native name of " Goonegerah," stands out high above the 

 dense forest, which, save in this instance alone, clothes to their 

 summits the long ridges and many peaks of this wild district. 



Denudation has finally resulted in the formation of two main 

 watersheds in West Croajingolong. Of these, the first is known 

 as the Coast Range, and runs roughly east and west, from Mount 

 Bowen, through Goon Murk, to Mount Tennyson ; the second 

 runs roughly north and south, from the Coast Range in the 

 north, through Mount Ellery, its culminating point, then on to 

 the M'Culloch Hills, with Mounts Tanglefoot, Jack, and Lookout, 

 and then south to Mount Raymond. From the M'Culloch 

 Range a narrow ridge runs west to the Brodribb, to a spot where 

 the river has apparently cut a narrow gorge across it, and then 

 joins a range passing south to Mounts Watt and Buck. These 

 watersheds divide the west portion of the county into three 

 main parts. 



