422 Canadian Record of Science, 



this that the anorthosite is a sedimentary formation which 

 lies unconformably on the gneiss. 



This occurrence became frequently cited as a proof that 

 the anorthosite forms a series of beds which overlie the 

 gneiss unconformably. 



Kichardson's examination of the district was, however, 

 very general, and no one has visited the district to cor- 

 roborate his observations. It may therefore be advisable 

 not to draw from the evidences adduced by him the hasty 

 conclusion that these rocks here exhibit stratigraphical 

 relations differing widely from those in other places. 



The gneiss often shows, according to him, "little or no 

 evidence of stratification ;" and in the only place where 

 the anorthosite was found in contact with the gneiss, the 

 latter was a " reddish quartzose granitoid rock offering no 

 evidence of stratification." He does not adduce any exam- 

 ple of gneiss and anorthosite being found in close proximity 

 with different strikes. A careful investigation of the 

 geognostical relations would probably show that here, as 

 in the Morin area and elsewhere, the alleged proof of the 

 unconformity is only apparent, and that in reality the 

 schistose varieties of the rock are really only portions of 

 eruptive masses which acquired their schistose structure 

 through pressure. The only hand-specimen of anorthosite 

 of this part of the coast which I have seen came from the 

 " Bay of Seven Islands," and exhibited throughout the 

 properties of a massive eruptive rock. 



At Sheldrake, about 60 miles east of the mouth of the 

 Moisie, the coast, according to Selwyn, 1 likewise consists 

 of " massive labradorite rocks," with beautiful opalescent 

 labradorite. The rock extended to a considerable distance 

 inland, but it is not known how far. It is possible, as 

 Selwyn conjectures, that it is continuous with the area 

 above described on the Moisie Eiver, and that the latter 



i Selwyn, Summary Report of the Geological Survey of Canada, 1889, p. 4. 





