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IRELAND, 



117 



metamorpliic. Granite consists of quartz felspar and black Upper 



Gallery. 



mica. — 



133. — Junction of gneiss and granite with an inter- Wall " case 45 - 



nosed granitic vein composed of felspar with a little quartz 

 and mica. "At Strontian, in the western part of Argyleshire, 



gneiss which 



Official Catalogue of the Great Ex- 



a boss of granite is seen penetrating the 



abounds in the district, and a little further to the west a 



large quantity of porphyry and trap occurs, covered in two 



or three places near Ardnamurchan by deposits of the oolitic 



and liassic period." 



hibition, 1851, p. 127, vol. i. 



From 125 to 133 the specimens belong to the great series 

 of metamorpliic, gneissic, and mica-schist rocks that form 

 the Grampian Mountains. 



Metamorphic limestone, Tiree marble, Island of 

 Tiree, Western Isles. Pink marble with crystals of augite. 

 In a mass about 100 feet in diameter associated with gneiss. 

 M'Culloch's " Western Isles/' vol. i., p. 49. See also polished 

 cube, No. 28, in the Lower Hall, table-case of marbles. 



134. 



Metamorphic rocks from Ireland. 



135. — Talcose slate, with contorted lamina, slightly 

 foliated ivith quartz. Croghan Kinshela Mountain, County 

 Wicklow, Ireland. Near contact with granitic porphyry. 

 136. — Clay slate, nearly unaltered, Dunlaven, County 



Wicklow. Ireland. 



137. 

 granite, 



II 



If 



and 



County Wicklow. Seems some- 



c/ 7 n7 



what micaceous with small imperfect crystals perhaps of 

 staurolite. 



138. — Micaceous slate, near granite, Hollywood Glen, 



County Wicklow. Possesses a wavy structure, probably in- 

 duced by the development of imperfect crystals of staurolite. 

 139. — Micaceous slate, near junction of slate and 

 granite, near Hollywood, County Wicklow. Slightly foliated 

 and gneissic in structure. Contains crystals of staurolite. 



