1865.] 



HAEKNESS drMBEBlAIirD AND WESTMORELAND. 



239 



they agree with the higher 

 beds of the Skiddaw slate 

 series as these are seen near 

 the junction with the suc- 

 ceeding green slates and por- 

 phyries of the Lake-district 

 proper. 



South-east from Mickle Aw 

 Fell, another hill of greater 

 elevation is seen. This, named 

 Cuns Fell, has a very different 

 mineral nature from the ele- 

 vations which are composed 

 of Skiddaw slates. Cuns Fell 

 has also a diiferent outline 

 from Mickle Aw Fell. Its 

 summit is craggy ; and the 

 upper portion of its eastern 

 side presents prominent 

 bosses of rocks, which have 

 strewn this side and the 

 south-eastern slope with an 

 enormous quantity of debris. 

 The rock forming Cuns 

 Fell is a greenish crystalline 

 porphyry, in which crystals 

 of felspar are abundant ; it 

 has considerable affinity to 

 the green rocks of the lower 

 portion of the green slates 

 and porphyry series of the 

 Lake-district, especially as 

 these are seen in Barton Fell, 

 overlying the Skiddaw slates, 

 but in the latter locality the 

 green rocks are somewhat 

 less crystalline than in Cuns 

 FeU. 



These green porphyries 

 form also the great mass of 

 the rounded hill called Cat- 

 terpellet, lying immediately 

 south-west of Cuns Fell, to 

 the north-east of which, like 

 the Skiddaw slates, they pass 

 under the Old Red Sand- 

 stone. On the south side of 

 Cuns Fell there is a rather 

 large and somewhat semicir- 

 cular valley known as Ousby 



VOL. XXI. PAET I. 



Fault 



^•rs 



o 2 





Highcup Gill. 



Murfcon Pike 

 ■ (1949 feet). 



Murton Beck. 



-Roman Fell. ?= 



