202 THE CANADIAN NATURALIST. [JuDG 



•which are a few beds of white compact marble. No indications 

 of fossils, savefucoidal markings, were met with in this section. 

 At Coney- Arm Head there is seen a series of " whitish granitoid, 

 very quartzose mica-slates," which appear to have a thickness of 

 from 1500 to 2000 feet. The same rock is found in White Bay^ 

 where it overlies what is supposed to be J vaurentian gneiss. The 

 relations of these whitish granitic mica-slates are still obscure, 

 but Mr. Murray was inclined to regard them as occupying a 

 position beneath the Potsdam group. The latter, in Canada Bay 

 is immediately followed by the unaltered fossiliferous limestone, 

 and shales of the Quebec group. From these investigations of 

 Mr. Murray we learn that between the Laurentian and the 

 Quebec group, there exists a series of several thousand feet of 

 strata, including soft bluish-grey mica-slates and micaceous lime- 

 stones, belonging to the Potsdam group ; besides a great mass of 

 whitish granitoid mica-slates, whose relation to the Potsdam is 

 still uncertain. To the whole of these we may perhaps give the 

 provisional name of the Terranovan series, in allusion to the 

 name Newfoundland. 



Imperfect gneisses and schists are found in several parts of the 

 province of New Brunswick, associated with what has been de- 

 scribed as a great grantic belt. These rocks have been examin- 

 ed by Prof. Hind, and by Mr. Eobb, on the St. John and 

 Mirimichi rivers ; and the former of these observers some 

 years since pointed out the indigenous character of the so-called 

 granites. In th3 summer of 1869 I had an opportunity of ex° 

 amining, with Prof. L. W. Bailey, the region about St. Stephen, 

 on the river St. Croix, where he had already observed a series of 

 ferruginous quartz ites and imperfect gneisses, accompanied by 

 soft bluish mica-slates sometimes holding chiastolite, staurolite, 

 and garnet. These highly crystalline schists are not more than 

 five miles removed from unaltered shales of the Gaspe series 

 containing fossils of Upper Silurian or Lower Devonian types, 

 and rest unconformably upon older granitoid rocks, which Prof 

 Bailey regards as probably Laurentian. We subsequently ex- 

 amined the crystalline schists of the St John, which are apparent- 

 ly identical with those of the St. Croix, and these also overlie, 

 unconformably, an older granitoid gneiss. ^ 



* Subsequent examination and comparison leads me to conclude that 

 the underlying granitic rock here referred to, which occurs on the St. 

 .Tohn near the mouth of the Shogamoe is not an indigenous rock, but an 



