448 HONEYMAN ON GEOLOGY OF NEW BRUNSWICK. 



may be regarded as corresponding with the central band of the 

 Cobequid, and the syenite and other granitoid rocks of the Lower 

 Arisaig series of Nova Scotia. Following the granite gneissoid 

 syenite we have the great limestones for which the district is cele- 

 brated. These are largely crystalline ; some are dolomitic. Lime 

 is manufactured in large quantities, in several localities. One 

 quarry on the road from Rothesay to St. John, with kilns, was 

 examined. The limestone is bluish and not obviously crystalline. 

 The limestone was parted by a bed of diorite ( ?) It was seen 

 outcropping in all directions. Quarries are abundant, and sections 

 are seen on the St. John and Shediac Railway ; diorites are also 

 seen in connection with the limestone. Massive crystalline crypto - 

 diorites of the I. C. R. type are often met with. I would particu- 

 larize. Near the Suspension Bridge the limestones are graphitic. 

 The bridge on the Carleton side rests upon graphitic rock and 

 schists. On the south side of the harbour there are eminences 

 formed by a siliceous rock. This seemed to be the upper rock of 

 the band of crystalline rocks. 



I have no hesitation whatever in re^ardin^ this band of rocks 

 as a counterpart of the Lower Arisaig series of Nova Scotia. This 

 is the first opportunity I have had of examining a series of this kind 

 out of Nova Scotia, with the exception of the George\ Mountain 

 series, Cape Breton. The resemblance of the Cape Breton series 

 to that of Arisaig of Nova Scotia, is sufficiently obvious, but not 

 more so than of that before us. The great lithological character- 

 istics of the three series are identical, e. g. syenites, diorites, 

 calcites. Each has also its lithological peculiarities. (Vide Papers 

 by the author in Transactions of the Institute, and Report of Bayley 

 and Matthews.) This is reasonably to be expected, as 'precisely 

 similar conditions of formation could not be expected to exist in 

 separate localities. 



The New Brunswick Geologists seem to have established the 

 Laurentian age of the series of rocks that we have been examining. 

 They are older than the primordial (Lower Silurian). They are 

 even older than another series which underlies the primordial, and 

 which is found intervening between the Lower Silurian and the 

 rocks in question. There are no fossils in either of the series 



