l68 NEW YORK STATE MUSEUM 



deposits. We have remarked that while almost horizontal^ there is 

 a definite dip in the strata to the northeast which is conspicuously 

 displayed in the precipitous eastern face of Mt Ste Anne, and in the 

 western wall of the distant Bonaventure island, 3 miles out to sea. 

 From Bonaventure island, which is wholly composed of these strata, 

 Logan derived the term Bonaventure which he originally applied to 

 the entire series of these rocks, chiefly conglomerates, and these he 

 regarded as of Carbonic age. Ells, approaching the region from a 

 study of the conglomerates of the Bay of Chaleurs interstratified in 

 which have been found Devonic fossils (chiefly fishes of Old Red 

 sandstone type) recognizes differences in the conglomerate mass and 

 assigns to the Bonaventure the upper beds of Mt Ste Anne and all 

 those covering Bonaventure island with which they were continuous, 

 believes an unconformity to exist between the upper and lower con- 

 glomerates of Mt Ste Anne and assigns the latter including the 

 sandstones and interbedded limestones, to the Upper Devonic age. 

 Of such interruptions of deposition in the conglomerates we could 

 find no evidence in the Perce region but if we interpret these inter- 

 esting sediments aright, it is quite in accordance with the judgment 

 we have been able to form, that they do actually represent a period 

 of time partly Devonic but transcending that era into the next suc- 

 ceeding. We may note the character of these strata in some detail, 

 beginning at the lowest accessible exposures. 



Shore between Eobin beach and Cap Blanc. Near the mouth of 

 Lenfesty's brook we find in the shore wall an exposure about 25 

 feet in hight, at the base of which are red shales overlain by red 

 and white sandstones and conglomerates, then red shales followed by 

 conglomerates and above these are gray hydraulic limestones. The 

 conglomerates are variable, in lateral extent, passing into sandstones 

 but reappearing in great force to the south, the limestones disappear- 

 ing. The pebbles of the conglomerate are at this horizon, largely 

 of jasper and with a very small percentage of limestone of the char- 

 acter of the higher beds. On Bonaventure island the conglomerates 

 also contain much jasper but the limestone pebbles predominate. 



Mt Ste Anne. The sandstones and limestones of the lower beds 

 are also seen in climbing Mt Ste Anne and in the vicinity of Irish- 



