242 



SYENITE. 



Upper 

 Gallery. 



Wall-cases 

 6 and 7. 



This rock occurs in large detached blocks, which probably 

 formed portions of a dyke traversing the granite of the dis- 



) The sarcophagus for 



trict. 



the late Duke of Wellington is formed of a single block of 

 this stone. (See « Descriptive Guide," p. 26.)— Luxulion, 



miles south-west of Lostwithiel, Cornwall. 



144. — Syenitic granite, composed of auartz 



H 



flesh 



blende. 



felspar, black mica, and a small proportion of horn- 

 et. Brelade's Quarry, Jersey. 

 145. — Syenitic granite, composed of two varieties of 



felspar {white and light flesh-coloured), a small quantity of 

 quartz and hornblende, and a little black ?mca.— Strontian, 

 Argyleshire. 



146. — Syenitic and porpiiyritic granite, composed of 

 large crystals of white and light-pinkish felspar in a base 



of translucent quartz, hornblende, and black mica Stron- 



tian, Argyleshire. 



147— Grey syenitic granite, composed chiefly of horn- 

 blende, with felspar and quartz and a few specks of iron 

 pyrites. Black mica occasionally replaces a portion of the 



hornblende. Used 



Guernsey. 



148. — Syenite, composed of white milky quartz in a fel- 

 spathic base, with lines and specks of hornblende.— My ny&& 



Cefn Amwlch, 9 miles west of Pwllheli, Caernarvon- 

 shire. 



149— Red felspathic syenite, chiefly composed of reddish 



fi 



This rock may be regarded as the fundamental rock of 



the chain of the Malvern Hills. 



(See "Memoirs of the 



Geological Survey," vol. ii., part 1, pp. 40 and 41.)— Great 



Malvern, Worcestershire. 

 150. — Syenite. 



/« 



the latter with a tendency to form separate aggregations. 



Me 



151. 



fi 



in crystals) and hornblende, with a very few minute specks 

 of iron pyrites. Used as a building stone— Guernsey. 



jstic 



$¥■ 



GlEE> 



156 



ireqi 

 tie set 



■ratio 



R 



,H 



159. 



; 



rn: 



160, 



u 







^ 



