132 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Dec. 17, 



The rocks on the southern flank of Black Comb consist of strata 

 with slaty cleavage, interstratified with flaggy beds, the latter yield- 

 ing fossils and dipping N.N.W. Along the course of the stream flow- 

 ing from near the summit of Black Comb southwards, and which 

 is known as Black Comb Beck, a coarse slaty cleavage prevails 

 among the rocks, which also dip N.N.W. These rocks abound in 

 quartz -veins, in which cobalt has been sought, but without profit- 

 able success. 



Towards the south-west side of Black Comb, a little above Whicham 

 Church, the Skiddaw slates are also seen. Here they are hard, and 

 possess somewhat the nature of flinty slate. In this locality also 

 cobalt has been attempted to be worked. Continuing along the west 

 side of the range, the Skiddaw slates still have the N.N.W. in- 

 clination, but at varying angles ; they are well seen at Whitebeck 

 and also at Foss-beck *. 



Worth of Foss-beck, near Hole-beck, and on the south side of the 

 latter stream, a fine-grained grey granite occurs, which has been 

 worked ; but it seems in no way to affect the general arrangement of 

 the Skiddaw slates. This granite was described as occurring here by 

 Mr. J. G. Marshall at the Manchester Meeting of the British Associ- 

 ation, 1861. The Skiddaw slates of Black Comb continue northward 

 to near Bootle, where the porphyries associated with the greenish- 

 grey rocks begin to make their appearance. 



The Skiddaw slates of the Black Comb range do not extend north- 

 wards beyond the parallel of Bootle, the road from this place over 

 the hills to Broughton exhibiting no Skiddaw slate. At Fell Green, 

 a mile east of Bootle, on this road, the greenish-grey series and 

 the accompanying porphyries are seen, and the country between 

 this and Stoneside-fell is composed of rocks of a similar character. 

 At Stoneside-fell, on the south side of the road, a dark porphyry 

 with light-grey crystals appears in this greenish-grey series ; and 

 the outline of Corney-fell, a hill on the north side of this road, in- 

 dicates that the rocks which compose it also belong to the same 

 greenish-grey series. At the Druids' Temple, about a mile south- 

 east of Stoneside-fell, they also occur, while at Swineside, a short 

 distance to the west, the Skiddaw slates make their appearance, 

 dipping N.N.W. 40°, and having a greyish-drab colour. 



The section of the Skiddaw slates of Black Comb shows an almost 

 continuous N.N.W. inclination, from their appearance on the south- 

 ern flanks of this range until they are succeeded by the greenish-grey 

 rocks of Stoneside-fell. Their relation to the greenish-grey series on 

 the south, at Millom, is seen in Professor Sedgwick's section f. 



In the Whicham portion of the section there is a great fault, from 

 which the rocks dip in opposite directions. The continuous exposures 

 of N.N.W. dips in the Skiddaw slates of the Black Comb range, 

 from the southern flank for about three miles N.N.W., lead to the 

 conclusion that on the south side of this range some of the lowest 



* There are abundant " Screes " on the west side of the Black Comb range ; 

 and, if well examined, they would no doubt afford fossils, 

 t Quart. Journ. Geol. Soc. vol. n. p. 111. 



