16 



J. CLIFTON WARD ON THE GRANITIC, GRANITOID, AND 



4. Carroch-Fell Rocks. — It will be seen by the accompanying 

 figure (fig. 3) that the various igneous masses of Carrock Fell and its 



Fig. 3. — Sketch Map showing the Distribution of the Carrocl- Roles. 

 (Scale 1 inch to a mile.) 



-v- Alluvium. 

 G. Granite. 



F. Spherulitic felsite. 

 bG. Bastard granite. 



Gv. Diorite. 

 Mica-schist. 



Hi/. Hypersthenite. 

 SI. Skiddaw Slate. 



neighbourhood dovetail more or less into each other along an east- 

 and-west strike. 



4 a. Spherulitic Felsite of Carroclc Fell and Great Lingy Hill. — 

 The colour of this rock varies from a pale reddish tint to a brownish- 

 grey and grey, its colour generally serving to distinguish it from 

 the other rocks having the same general range. There is nothing, 

 lithologically, to indicate the spherulitic nature of much of this 

 rock ; but this character, as hereafter shown, is clearly revealed by 

 microscopic examination. Its appearance is that of a rather coarse- 

 grained felsite, with scattered greenish spots, and minute, porphy- 

 ritically imbedded felspar crystals. 



The best exposure of this rock is on the summit of Carrock Fell 

 and in the crags just east of the summit. In some parts it has 

 quite the appearance of passing into a trap of much the same nature 

 as many of the contemporaneous beds of the district. A good 

 example of this occurs on the Pike, just east of the Stone Circle. 



The felsite graduates on the west and south of Carrock-Fell 

 summit into diorite (?) on the one hand and hypersthenite on the 

 other. 



4 6. Diorite (?) of Miton Hill and Round Knott. — This rock has a 

 somewhat limited extension, though both felsite and hypersthenite 

 seem to pass over into it, occasionally, in other parts than the area 

 given as its particular range. 



Lithologically it is a dark green, highly crystalline compound of 

 felspar and hornblende (?), becoming coarse-grained in the south, 



