TJPPBE 



Gallery. 



Wall-cases 



6 and 7. 



226 



GRANITE. 



Forms part of a granitic dyke, extending towards the east. 

 (See Geological Map, No. 30.) 



Is employed for roads, for which it is a good material 



and might be used for ornamental purposes Near Lower 



"Woodley, Lanivet, Cornwall. 



36. — Porphyritic granite, large crystals of light flesh- 

 coloured felspar, in a quartzo-felspathic base, with a small 

 quantity of schorl. Map 33. — Bossullow Down, Morvah 



Cornwall. 

 37. 



felsp 



form separate crystals, quartz, schorl, and mica. Map 



•Rosemodris, St. Buryan, Cornwall. 



38. — Granite, composed of two varieties 



(ivhite and light brown), < 

 scarce and small). Map 

 Cornwall. 



felsp 



•Knill's Monument, St. Ives. 



39. — Granite, chiefly composed of quartz, light-coloured 

 felspar, a little black mica, with disseminated crystals of 

 roseate and ivhite felsp ar , and a few specks of schorl. (See 

 "Report on Cornwall," p. 162.) Map 31.— Cligga Point, 

 Cornwall. 



40. — Fine-grained granite, composed of white felspar, 



quartz, schorl, and silvery mica. The granite from which 

 the specimen is taken forms part of a dyke extending 

 east and west across the southern side of Belovely Beacon, 

 through Castle Downs to Higher Rosewastes, near St. Co- 

 lumb Major. (See Geological Map, No. 30.) The felspar 

 of this dyke is occasionally liable to decomposition in 

 parts of its course, especially near the little 

 under Castle an Dinas, where it resembles a white clay 

 containing quartz and a little mica. — Belovely Beacon, 

 Cornwall. 



village 



41, 



felsp 



crystals), translucent quartz, schorl, and black mica. Forms 

 a portion of the Hensbarrow mass of granite. Map 30. 

 St. Dennis Down, St. Dennis, Cornwall. (See "Report on 



Geology of Cornwall," p. 160.) 







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