66 b 



GEOLOGICAL SURVEY OF CANADA. 



cal. South of Anchor Cove, the conglomerates are characteristically 

 shown on the eastern half of South Point, where it is probable that they 

 represent the western edge of a small synclinal holding the basal 

 beds, but of which the remainder is concealed by the water. To the 

 north of Anchor Cove, as traced by Mr. Bichardson, they appear to 

 fringe the shore with slight interruptions till the first described area 

 at Slate Chuck Creek is reached. In the western part of this we 

 appear to have the continuation of the synclinal just alluded to. 

 Triangle Island is also composed of conglomerates, which fold round 

 the southern end of an anticlinal, showing a narrow margin of the 



Lower beds. Lower Shales at the water's edge on the north side. The lowest bed 

 of the conglomerates is here again undulating, and holds shaly frag- 

 ments. The massive character of the conglomerates causes the regions 

 occupied by their outcrop to be characteristically rough and hilly, 

 while the islands composed of this subdivision are high and abrupt. 



Fossils, The only fossils found in rocks of this subdivision were some fragments 



of Belemnites, which occurred near the first or eastern narrows on the 

 channel to the west coast. 



Subdivision c. C. Lower Shales and Sandstones. — This subdivision, at the base of 

 which the anthracite coal is found, consists of blackish or grey shales, 

 interbedded with grey or yellowish-grey sandstones, and numerous 

 layers composed of sandy argillaceous material, intermediate in char- 

 acter between shale and sandstone. The bedding is generally regular, 

 and certain zones are characterized by large calcareous nodules, 

 generally lenticular, and occasionally several feet in diameter or even 

 coalescing to form sheets of calcareous matter. Layers so coarse as to 

 be called conglomerates scarcely o^cur. The beds immediately under- 

 lying the conglomerates of Subdivision B. are generally grey shales, 

 very regular in their bedding, and quite hard. Below these is a con- 

 siderable thickness of strata in which shaly beds usually preponderate, 

 while toward the base of the subdivision sandstones are more important. 

 The lowest beds are of interest as being those in association with which 

 the coal is, and require to be described in greater detail, though the 

 structure of the actual locality in which the mine was opened will be 

 noticed subsequently. 



Subdivision C. rests on a series of volcanic rocks constituting Subdi- 

 vision D., which apparently forms a member of the same formation. 

 The upper surface of the agglomerate and ash rocks of D. must, how- 

 ever, have been an irregular one, and to its undulations the lower beds 

 of C. more or less closely conform. The appearance at the junction of 

 Subdivisions C. and D. is therefore that of unconformity more or less 

 marked. This is particularly evident in the Channel Islands, which, 



Composition. 



Irregular junc- 

 tion with D. 



