﻿ProUems in Quebec Geology. 487 



In 1845, Capt. Bayfield, in a paper published in the 

 Geological Journal, claimed that the Trenton limestone, 

 which appears on the north side of the St. Lawrence, 

 above Quebec city, must, from its stratigraphical position 

 beneath the greywacke and slate series, be an older 

 formation ; and this view was held to be supported by 

 the presence of fossils in certain bands of conglomerate 

 which appeared to be an integral portion of this latter 

 series. These fossils were in pebbles, supposed to be 

 derived from beds of the Trenton limestone, which rests 

 upon the Laurentian gneiss in the area to the north of 

 Quebec city ; so that on this evidence, if correctly inter- 

 preted, the slate and conglomerate portion would be more 

 recent than the Trenton. In the report for 1843, Sir W. 

 E. Logan stated that the rocks of the Point Levis series 

 came out from beneath the limestone of the St. Lawrence 

 and belonged to an apparently older horizon, but in a foot- 

 note to this report, it is also stated that the bulk of the 

 evidence points to their superior position, which would 

 make them the equivalents of the Hudson .Eiver and 

 Lorraine formations. 



In the report for 1844, while discussing the general 

 character of the slates, limestone and conglomerates along 

 the south side of the St. Lawrence to the east of Cape 

 Chat and towards the extremity of Gaspe, Logan expressed 

 the opinion that, from the run of the strata along this 

 part of the coast, it is not improbable that certain por- 

 tions of the strata, to the west of that point, may belong 

 to a lower formation ; since along this part of the river 

 below Quebec they come to the shore in an oblique 

 direction from the mainland, and may therefore represent 

 older horizons. As for those beds which contain the 

 coaly matter, it is also stated that the rock containing it 

 is supposed to be the equivalent of the Hudson Eiver 

 group of the New York geologists. 



In the report for 1847-48, it is stated that the red 



