248 



GREENSTONE. 



Upper 

 G alleey . 



Wall-cases 

 6 and 7. 



204. 



argillaceous slates. 



& 



Greenstone associated with contemporaneous 



— Near Trereife, Penzance, Cornwall. 



(See " Report on the Geology of Cornwall/' p. 100.) 



205. — Compact greenstone, locally termed " ironstone." 

 ■Botallack Mine, St. Just, Cornwall. 



206. — Compact greenstone, locally termed "ironstone" 



Huel Cock, St. Just, Cornwall. 



207. — Compact greenstone. — Burncocse, near Gwen- 

 nap, Cornwall. (See "Report on the Geology of Cornwall," 

 p. 176.) 



208. — Greenstone, a finely divided mixture of felspar and 

 hornblende. — Dranna Point, St. Keverne, Cornwall. 



209. — Greenstone, somewhat hypersthenic. — One of the 

 numerous trappean masses of the vicinity which appear to 

 have been intruded among the fossiliferous slates. Em- 

 ployed for roads and building. It is an excellent material 

 for the former purpose. — Hill, west from Dinham, Padstow 

 River, Cornwall. 



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210. — Greenstone, composed of hornblende, with a small 



if els j> 



(See "Eeport on Cornwall," p. 100.) 



Guavas Hill, Newlyn, near Penzance, Cornwall. 

 211. — Basalt. — Little Wenlock, Buildwas, Salop. 



212. 



ifelsp 



and diallage. (See " Report on Cornw 

 Giily Cliff, St. Keverne, Cornwall. 



213. — Greenstone, composed of veins and laminas of 



fibrous asbestus in a light green felspathic base. — Conway, 

 North Wales. 



214. — Greenstone, with veins of asbestus. From a 

 dyke traversing the trap rock of Llyn Peris.— Llanberis, 

 Caernarvonshire. 



215. — Hornblende hock. — Greeb Rock, Mount's Bay, 

 Cornwall. 



216. — Hornblende schist, an irregular aggregation of 



hornblende in imperfect crystals. Used for building-stone. 

 Guernsey. 



217 — Hornblende rock, — Llanerchymedd, Angle sea. 



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