34 PKOCEEDINGS OF THE GEOLOGICAL SOCIETY. [NOV. 5, 



feet it changes from red to greenish grey, bine, and sometimes black. 

 In the bed of a natural ravine I commenced a shaft in the blue 

 schist, which, in descending, was found to be more thinly laminated 

 and of a greyer colour. 



I also commenced shaft No. 2 on the northern boundary of this 

 red schist, and, at a depth of 80 feet, a pale-brown sandstone was 

 met with. However, no blue or grey schist was seen in this shaft ; 

 but the variegated schist was found immediately beneath the red 

 surface, and continued for about 80 feet. This shaft was evidently 

 sunk on the outer edge of the red schist. The pale -coloured, brown 

 sandstone resembled that which I found in the Wells, but, not being 

 provided with a pump of any sort, the water overpowered my 

 attempts to pierce it. 



The red schist often assumes a hard, fissile, unevenly stratified 

 character, and appears occasionally to be traversed by veins of 

 quartz, and probably is quite of a different age from the pink schist 

 (H), which is much softer, and has invariably a very thin foliation ; 

 with the latter is also associated a cream-coloured arenaceous schist. 



The schists are situated on a ridge of hills varying from 100 to 

 400 feet in height. Excavations, which can scarcely be called shafts, 

 both horizontal and vertical, have been commenced; and the notes 

 taken on the spot are herewith recorded. In gallery No. 3 (hori- 

 zontal), white and reddish-brown schists were found. In sinking 

 No. 4 shaft, commenced at the bottom of a ravine, about 200 feet 

 below the top of the hill, thinly laminated, pinkish-coloured schist, 

 indurated clay, 2| feet thick, and, at the bottom, finely laminated 

 schist were found. 



No. 5 shaft was sunk at right angles to the dip, through fine- 

 grained, white, thick schist. 



In shaft No. 6 were seen speckled white, brown, and yellow 

 schists, and, beneath them, hard brown schist. 



It is perhaps essential that I should attempt to describe the 

 difference of the immediately underlying rock occasionally found 

 under these pink and cream-coloured schists. It is a hard, arenaceous 

 limestone (I), which is accompanied with a soft, dark, purple-coloured 

 substance (ochre) (K), and iron-sandstone (L), in rectangular pieces, 

 very abundant ; in fact, the whole ground in this locality for a 

 considerable distance is coloured brown. The ironstones run in 

 bands, varying from 1 to 3 inches in thickness, and have a geodic 

 structure. In consequence of the great labour and expense required, 

 I have not sunk any shaft in this rock, but, at the depth of 5 feet, 

 layers of white sand and blackish powder were found intermixed 

 with it. 



There is also another point of interest (a true limestone-basin) in 

 this locality. On the north, south, and west sides there is a dark- 

 coloured limestone, dipping towards a common centre, at angles 

 varying from 5° to 52° ; and on the east side there is a thicker lime- 

 stone, more of the dolomitic kind, which dips 14° west, and strikes 

 north. It contains numerous large, circular holes, about 8 inches in 

 diameter, apparently the casts of some fossil, as the rock is not in a 



