ON THE GEOLOGY OF ST. JOHN. 



249 



Long Island in Kennebeckasis R. is princi- 

 pally composed of conglomerate and sand- 

 stone of lower carboniferous age, whicb rise 

 in a bold and picturesque cliff from the 

 water's edge at the eastern end. At the 

 foot of this cliff and extending thence along 

 the southeastern side of the island, strata of 

 much greater age are exposed to view. 

 They consist in ascending order of — 1st. 

 Granite and granitic gneiss ; 2nd. Crystal- 

 line limestone and altered slate ; 3. Thinly 

 laminated grey shales with thin layers of 

 fine sandstone much contorted. The whole £ 

 dip to the northwest at an angle of 60o to § 

 *J0°. In the shales, fragments of a lingula "g 5 

 occur similar to that found in the St. John s 

 beds and probably identical with it. There § 

 are also numbers of worm burrows and ^ 



o 



other markings like those in the shales at &j 

 St. John. The texture and position of this S. 

 deposit as well as the obscure fossils which "o 

 it holds, seem to show that it is identical g; 

 with that which underlies the city. A 

 small exposure of slates, evidently a con- 

 tinuation of those on Long Island, may be ^ 

 seen at Sand Point on the south side of the a. 

 river, six miles southwest. § 



These limited exposures of slate seem to «" 

 me to point out the occurrence of a belt of §< 

 fine sediments on the northwest of the ' 

 Portland series of rocks similar to that 

 which is more clearly seen on the south- 

 eastern side of St. John, &c. ; and further 

 to indicate that the valley of the Kennebec- 

 kasis, now mostly filled with carboniferous 

 deposits, was originally scooped out of the 

 soft beds of the St. John group. 



Bloomsbury Group — a. Volcanic beds. 

 At the centre of the parish of Simonds, St. 

 John County, rises a high hill called Blooms- 

 bury mountain, the western termination of 



■Kingston. 



\Longl, 



Kennebeckasis. 



Ooldbrook. 



,M. Prospect* 



r a 



Beaver L. 



Mispec .R_ 



WesfHead. 



Bay ofFundy. 



