284 THE GEOLOGY OF THE LABRADOR COAST. 



sion House the strata are much disturbed locally ; at one 

 locality the gneiss with veins of quartz and syenite 

 trends northwesterly and dips 60° west. Trap dykes, 

 prismatic in places, cross the island in a northeasterly 

 direction. 



Northward of Hopedale the " Aulezavic gneiss" of 

 Lieber 'forms the coast range of mountains, which, ac- 

 cording to Lieut. Curtis (Trans. Geol. Soc, London, 

 vol. ii. 1773), rise to a height of 2,733 f^^t at Mount 

 Thoresby, on an island south of Kiglapeit. This 

 observer states that Kiglapeit is evidently higher than, 

 but inferior to, Kaumajet, which " has been seen thirty 

 leagues from land," and is lower than Nachvak, which 

 must be three thousand feet high. 



At Aulezavik Island near Cape Chidley, according to 

 Mr. Lieber, " syenitic gneiss is the true rock of the 

 region, the normal one, although so many modifications 

 occur that entirely new rocks are produced, having no 

 direct connection with the basic syenitic gneiss. In 

 consequence of this we have beds in which quartz alone 

 occurs, or beds entirely occupied by the red feldspar of 

 the region, as is seen with very beautiful distinctness" in 

 some of the dangerous Pikkintit Islands. Again, some 

 beds are composed of white quartz and tourmaline as in 

 Norway, others contain scarcely anything but black 

 hornblende, or tourmaline and garnets. Some are com- 

 posed of green hornblende, approximating to actinolite. 

 From this there seems to be a passage into a coarse 

 diorite rather porphyroid in its character, but occurring 

 in regular intercalated beds, not in dykes, and evincing 

 no sign of an eruptive origin. Again, some beds are 

 composed of quartz and garnet, while others are studded 



