QUEEN CHARLOTTE ISLANDS. 55 P> 



The ore is a reinarbably pure coarsely crystalline magnetite. Speci- Analysis. 

 mens of an average character examined by Mr. C. Hoffmann were found 

 to contain 58-06 per cent, of metallic iron, while a fragment exception- 

 ally rich yielded 69-88 per cent. 



The extremity of Granite Point is composed of a grey coarse-grained Granite Point 

 syenitic rock, which is evidently intrusive, but the precise relations of 

 which to the neighbouring beds is obscure. 



In Burnaby Strait green rocks, often evident volcanic breccias, pre- Burnaby Strait, 

 ponderate, and are indeed almost exclusively represented. They are 

 generally massive, showing no distinct bedding, but everywhere jointed 

 and fissured. These are supposed to belong to the great igneous series 

 which underlies the massive limestones. Irregular veins of red- 

 weathering dolerite are abundant in this vicinity. Both points of the 

 eastern bay on the north shore of Burnaby Island are composed of 

 similar massive greenish rocks, but on the east side of the next bay — 

 called Section Cove on the map — limestones appear resting on them, 

 and striking north-westward from the south-east point of Huxley 

 Island and a small islet lying off it. 



The rocks in Section Cove were examined with some care and measured Section Cove. 



by pacing. Their arrangement is represented on the section. (Fig. 2). 



The line of junction of the green rocks with the limestone is confused 



by innumerable small faults and fractures. The lower part of the 



limestone is massive and cherty in places, but it soon becomes flaggy, 



and contains in some layers abundance of fossils, chiefly belonging to 



,-, , n n • m • • • Triassic fossils. 



the two following Triassic species. — 



1. Monotis subcircularis, Gabb. 



2. Halobia Lommeli, Wiss. 



After about 350 feet of pretty pure limestone, the beds are concealed 

 for some distance, and when again seen are largely made up of cal- ^ e 4HJ n !S ls a ? d 

 careous flaggy argillites, nearly black in colour. These with occasional 

 beds of pure limestone form the whole upper part of the series, to a 

 large felspathic mass on the east side of the bay which appears to be 

 intrusive, and beyond which the beds are so much confused and broken 

 that no estimate of their thickness could be formed. Further on, 

 several additional intrusive felspathic masses occur. They are grey, 

 porphyritic, resemble some of those of Houston Stewart Channel, and 

 are probably of the same age. The thickness of the limestones and 

 flaggy argillites of the lower part of the series which maintain a suffi- 

 cient regularity to admit of accurate measurement is about 1733 feet. 

 They are generally in a nearly vertical attitude. 



