feet in deptli. None of tlie beds, however, present so close and 

 compact a grain as those exhibited in the eastern quarry. Be- 

 sides a considerable number of the beds approaching the foot 

 a,nd hanging walls of the band have a semi-slaty character and 

 laminated structure, and are quite unsuitable for architectural 

 use. 



Another quartzite band is exposed in Lindsay's quarry in 

 section 259, from which a considerable quantity of very fair 

 building stone of a brownish colour has been removed. It is 

 considerably harder in quality than those of the forementioned 

 quarries. 



The dip is 60° east, strike 10° west, and estimated thickness 

 is 270 feet. 



From this point east across the valley of the Eiver Gilbert, 

 on account of superficial covering no actual rock section is 

 exposed until reaching Brauhn's flagstone quarry in section 43, 

 which is rather over three quarters of a mile south of the line 

 of my cross section. From this quarry a considerable amount 

 of flagging must have been removed, for the excavation is 

 already over thirty yards long by ten or more yards in width, 

 and nearly the same in depth. The rock is of a dark grey 

 colour, and it could be obtained in slabs extending to 150 feet 

 superficial. The flags, though slightly inferior to those from 

 Mintaro, are far superior to those from AVillunga. The actual 

 thickness of the beds I could not determine. The foot and 

 hanging walls of the quarry, however, seem to be of as good 

 material as that which is worked. The dip is 70° east, strike 

 5° west. 



Following the line of strike north to the line of cross 

 section, I saw only one natural exposure of clay-slate in a small 

 gully, on the western side of Steelton Range, section 46. It 

 immediately underlies the quartzite band, and though unable 

 to ascertain its true dip, it evidently rests at a high inclination 

 to the east. The flagstone series is at least 150 feet below the 

 quartzite beds, and from the character of the beds here dis- 

 played I am led to infer that an intercalation of rubbly clay- 

 slate intervenes between the flag beds and the overlying 

 quartzites. 



The quartzite band of the Steelton range is of great propor- 

 tions where studied by me (sections 46, 39) ; and, indeed, 

 seems to be extensively developed throughout the entire extent 

 of the range. Though it does not occupy the crest of the 

 range, it is nevertheless exceedingly hard, in places almost ap- 

 proaching the character of true quartz. 



East from this point the country is occupied by a continuous 

 series of clay-slate. In a cutting (section 1,001) on the main 

 road leading: from Steelton to A7aterloo the slate rocks are 



