HONEYMAN ON GEOLOGY OF NEW BRUNSWICK. 449 



underlying the primordial. Their lhhological character, however, 

 is strikingly dissimilar, and therefore the descending series is 

 regarded as established, viz : Primordial (Lower Silurian), Huron- 

 ian (Cambrian), and Laurentian. I consider that from this point 

 of view, we are led to regard the Laurentian age of the Lower 

 Arisaig series as probable. 



At Coldbrook I observed rocks strikingly different from the 

 preceding Laurentian, conglomerates and quartzites. This is the 

 upper part of the Coldbrook or Huronian series of the New 

 Brunswick geologists, from what I have observed of this series, and 

 from the described characteristics of the lower part of the same 

 series. (Vide report of Bayley and Matthew.) I am disposed to 

 establish a relationship between them and the conglomerates, 

 quartzites, jaspers and crypto-crystalline diorites of the northern 

 part of the section of the I. C. It. in the Cobequid. (Vide paper- 

 by the author in Transactions, 1873— '74.) This series intervenes 

 between the Laurentian and the Primordial. It is said to extend 

 to the cove below the Suspension Bridge, on the St. John side. 



Succeeding this is the St. John Primordial (Lower Silurian) 

 strata. These were seen outcropping on Coldstream Brook, at Iron 

 Works. This is regarded as the lower part of the series. The 

 corresponding part is in the cove below the Suspension Bridge on 

 the Carleton side. Here the Lower Silurian is in contact with the 

 graphitic schists of the Laurentian series, the Huronian being 

 missing. 



The Lower Silurian slates of the cove are peculiarly interesting, 

 as they produced the Primordial Fauna which determined the age 

 of the slates, and consequently the age of the series already 

 described. This series of slates is generally dark in colour. They 

 have been metamorphosed, and remarkably twisted, folded and 

 faulted. The beautiful sections on the sides of the streets in 

 St. John, show these characters in a very striking manner. 

 The slates are also well exposed on the shore of Courtenay Bay. 

 My attention was particularly directed to a fine exposure of crystal- 

 line rock, near the cross roads, near the old Episcopal cemetery, 

 This rock is very dark, hard and glistening, being crypto-crystalline 



