418 Canadian Record of Science. 



masses of hornblende. The labradorite is of a smoky 

 colour, very lustrous, translucent, and opalescent, with 

 cleavage surfaces often two inches in diameter, and on 

 some of the faces presents a greenish reflection. This is 

 but a slight approach to the green-blue reflections of the 

 precious labradorite, which I have seen only at Hopedale, 

 where we obtained specimens brought from the interior 

 by the Eskimos. As the rock weathers, the greenish 

 hornblende crystals project in masses, sometimes two 

 inches in diameter. The gneiss rests on the south side 

 of the hills. From the top of the hills here can be seen 

 huge gneiss mountains at least two thousand feet high, 

 rising in vast swells at a distance of fifteen to twenty 

 miles in the interior, wmile the bay is filled with innumer- 

 able skiers and islets of gneiss." 



This quotation is taken from the book. In the above- 

 mentioned essay he calls the mineral which accom- 

 panies plagioclase, hypersthene and not hornblende. We 

 probably have here, as Packard says, a large area of 

 anorthosite in the southern part of Labrador. As already 

 mentioned, the " Domino " or upper gneiss is invariably 

 accompanied by what Packard designates as " overflows 

 of a peculiar trap rock evidently of the age of the Domino 

 gneiss, which it has somewhat disturbed." The trap is 

 said to have a coarse porphyritic structure, and to consist 

 of coarsely foliated masses of hypersthene and smoke- 

 grey labradorite, and to resemble exactly that which has 

 been described from Square Island, and which, according 

 to Packard, has originated from the remelting and ex 

 trusion of the other anorthosite. 



This goes, therefore, to prove that in Labrador the 

 anorthosite occurs in two entirely different and widely 

 different regions : First to the north, in the interior, and 

 in the neighbourhood of Nain, where the precious anor- 

 thosite occurs; and secondly, in the southern part of the 

 peninsula, in the neighbourhood of Square Island. 



