Upper 

 Gallery. 



"Wall-cases 

 6 and 7. 



254 



IGNEOUS ROCKS 



264. — Granite, composed of felspar (some in fine crys- 

 tals), quartz, and black mica. — Mount Johnstone, St. John's, 

 River Richelieu, Lower Canada. 



265. GllANULITE, LEPTYNITE, Or FELSPATHIC GRANITE, a 



compound of roseate felspar anc 

 Near Montreal, Lower Canada. 



From a boulder. 



266. 



Syenite, composed of large fragments of horn- 



blende, with 



/< 



and quartz. From a 



dyke occurring in a range of syenitic hills. — Maskmenga, 

 St. Lawrence, Lower Canada. 



267. Syenitic granite, containing garnets, and com- 



felspar, quartz, hornble\ 

 Mountain, State of Main 



posed of crystals 



silvery mica. 



States. 



268. Syenite, composed of light flesh- coloured felspar 



(some in crystals), with quartz, and hornblende. — Near 

 Montreal, Lower Canada. 



269. 



»f flesh- coloured ft 



and hornblende. Part of a boulder. — Near Montreal, 



Lower Canada. 



270. Syenite, composed of flesh-coloured felspar, quartz, 



and a small proportion of hornblende. Part of a boulder. 

 Near Montreal, Lower Canada. 



271. — Greenstone, composed of, for the most part, imper- 

 fect crystals of white felspar in a base of hornblende. The 

 specimen shews a weathered surface, with decomposing 

 felspar. — Beleiul Mountain, near Chambley River, Lower 



Canada. 



272. — Syenite, an irregular mixture of pink felspar, 



quartz, and hornblende. — Bytown Canal, Johnson Falls, 



Upper Canada. 



273. — Syenite, composed of hornblende in a felspatho- 

 quartzose base. Part of a dyke. — Montreal Mountain, 

 Lower Canada. 



274. — Syenite, composed chiefly of labradorite with 

 hornblende, and a small quantity of translucent quartz. 

 Part of a boulder. — Near Montreal, Lower Canada. 



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