FELSPATHIC TRAP. 



241 



U 







■ 



J 



m 



th E 



ipl 



•i 





■....■- 





I 





% 



■'. 



)' 





/ 



/ 



if 



4 





i 



I 



132. — Vesicular felspatiiic trap (used for building). 



Llandegley Rocks, Radnorshire. 



133. — Felspatiiic trap. — Llandegley Rocks, Radnor- 

 shire. 



134. — Concretionary felspatiiic trap. — Ilafnant, 3 

 miles south-west of Yspytty Evan, Merionethshire. 



135. — Felspatiiic trap, forming the base of the Snow- 

 don rocks ; showing an unevenly weathered and laminated 



surface. — Clogwyn-du'r-arddu, Llanberis, Caernarvonshire, 

 136. — Light grey compact felspatiiic trap, with white 



weathered surface and joints. — Quarter of a mile south of 



Moel-y-menin, Arcnig range, Merionethshire. 

 137. — Grey thin bedded trap.— 



north-west of Llanruochllyn. 



Y Wenallt, If miles 



138. — Compact greenish felspar trap, with occasional 

 thin lines and veins of red felspar and calc spar. — Winds 

 Point, Little Malvern, Worcestershire. (See " Survey Me- 

 moirs," vol. ii., part L, pp. 31 and 32.) 



139. — Felspatiiic porphyry. — Tinnacarrig Hill, near 

 New Ross. 



140. — Greenish felspatiiic porphyry', weathering white 



Carrick-a-daggan, near New Ross. 



141. — A kind of trappean rock, having a semi-mecha- 

 nical origin, and associated with a conglomerate of the 

 slate series. It is quarried for building-stone at the cliff, 

 close to the river. Map 30.— Opposite Cant Hill, Pad- 

 stow Harbour, Cornwall. 



Syenite. 



142. — Syexjtio granite, composed of large crystals of 



hornblende wit] 



i 



flesh-coloured ft 



nearly equal proportions ; and occasional black mica, ap- 

 parently replacing the hornblende. — Strontian, Argyle- 

 shire. 



143. — Syenite, composed of large crystals of pink fel- 

 spar, witli quartz, occasionally in prismatic crystals, and 

 some schorl in a base of hornblende. 



Upper 

 Gallery. 



Wall-cases 

 6 and 7. 



* 



