ASSOCIATED METAMORPHIC ROCK8 OF THE LAKE-DISTRICT. 



13 



from Wanthwaite Bank (a part of the eastern quartz-felsite tract) 

 there may be noticed several well-marked features, apparently es- 

 carpments and dip-slopes, quite similar in strike and angle of dip to 

 the well-scarped beds of High Bigg. When the ground is closely 

 examined, Skiddaw Slate is found to run in among the quartz felsite 

 in two places. One of these, just west of Bridge House, though only 

 a short inlet (a, fig. 1), is quite in the line of the most marked 



Fig. 1. — Sketch Map showing the Distribution of the Quartz Felsite of 

 St. John's Vale and its Position with regard to the surrounding 

 Bocks. (Scale 1 inch to a mile.) 



J 



M 



. / use* / //S\<S 



til ^ q > F ' ( 



Alluvium. Q.F. Quartz-felsite. 



Beds in volcanic series. — ■ 



i | , - Skiddaw Slate. 

 Faults and veins. 



transverse depression as seen from the other side of the valley. The 

 other is a band of slate (b) which, in a much altered condition, may 

 be traced from the fault near St. John's church, through and across 

 the south-western corner of the felsite to Sikes, where both are 

 hidden under alluvium. The appearance in this case is quite that 

 of a bed conformable to the felsite above and below. Along the 

 western side of this felsite tract there is a change in what appears 

 like bedding-dip, to the X.N.E. 



Again, when the eastern mass is looked at from the opposite or 

 western side, indications of bedding-planes are also seen ; and on the 

 slope above Wanthwaite farm a bed of ash (c) appears with felsite 

 above and below and apparently striking northwards, generally par- 

 allel to the margin of the felsitic mass. The southern margin of 

 this eastern tract is also partly bounded by vein-faulls ; but between 

 it and the crags of Wanthwaite and Clough Head, formed of vol- 

 canic rocks, occurs a small tract of, for the most part, highly altered 

 slate, containing two or three bands of ash, bounded on the east by 

 a probable north-and-south fault. It is very hard to distinguish 



