On the Norian or "Upper Laurentian" Formation. 423 



is in turn continuous with the area described by Richard- 

 son further west along the coast. 



As early as the year 1833, Bayfield 1 mentioned labra- 

 dorite and hypersthene as occurring farther eastward on 

 the coast of the St. Lawrence, at a place about five leagues 

 east of Ste. Genevievre, or about north of the middle of 

 the Island of Anticosti. 



(d) On the North Shore of the River St. Lawrence. 



Anorthosite occurs in extended areas on the north 

 shore of the River St. Lawrence, east of the City of Que- 

 bec, at two localities. The first, near Chateau Richer, 

 below Quebec, and the second in the neighbourhood of 

 St. Urbain and St. Paul's Bay, further east. Both occur- 

 rences are quite extensive and probably parts of the same 

 great mass, which may possibly have an extension of 

 about 70 miles along the river. These areas have not 

 yet been carefully investigated ; a short description of 

 them is found in the Report of the Geological Survey of 

 Canada for 1863. They are now being mapped by Mr. 

 A. P. Low, of the Geological Survey of Canada, whose 

 report on them will appear shortly. 



Particular attention has been directed to the St. Urbain 

 area, because considerable beds of ilmenite were found 

 in it. This mineral is very rich in titanic acid, and is 

 here and there associated with rutile. Many years ago 

 an attempt was made on a large scale to smelt this bed 

 for iron ; blast furnaces were erected and plans made for 

 the establishment of a whole settlement. The work, how- 

 ever, was abandoned, as the ore was too refractory owing 

 to its high percentage of titanic acid. 



I am indebted to Mr. Low for a series of small hand- 

 specimens of the rocks of both these localities, from which 

 thin sections were prepared. Their study shows that 



1 Bayfield, Notes on the Geology of the North Coast of the St. Lawrence.— Trans. 

 Geol. Soc. of London, Vol. V., 1883. 



