82 BULLETIN OF THE NATURAL HISTORY SOCIETY. 



development of pre-Cambriaii rocks, which appear from 

 the reports to be chiefly igneous ; and considerable areas 

 occur in Pictou county, and in the range of hills north of 

 the Basin of Minas. A large amount of volcanic material 

 of later age also occurs in the north-eastern part of the 

 peninsula. From Dr. Fletcher's reports it would appear 

 that the volcanic periods were about the same as in New 

 Brunswick, with the addition of the Ordovician. 



The Triassic traps forming the North Mountains of 

 Nova Scotia, lying all along the southern side of the 

 Bay of Fundy, are well known. Besides the main area 

 there are small detached ones in the Basin of Minas. 

 These rocks are often amygdaloidal and have a wide fame 

 as mineral localities. The rock has been examined by 

 Prof. V. F. Marsters and is a normal diabase, very uniform 

 in character and very like the Triassic traps of the eastern 

 United States. 



Prince Edward's Island affords no volcanic rocks. 



In Newfoundland theconditions were much like those 

 of Nova Scotia and New Brunswick. The Laurentian 

 rocks are capped by a series, in large part volcanic. (Of 

 the extent of later volcanics I cannot speak certainly, it 

 is probably much the same as in Nova Scotia.) 



So far, little note has been made of the intrusive 

 granites which form so important a feature of New 

 Brunswick and Nova Scotian geology. The main areas 

 of these rocks in New Brunswick are considered to be of 

 Devonian age ; they are found cutting through and meta- 

 morphosing Silurian strata, while as pebbles they iirst 

 appear in the conglomerates of sub-Carboniferous age. 

 Two great bands cross the province, the one coming in 

 from Maine north of the head of Passamaquoddy Bay, 

 and running north-east nearly to the St. John River ; the 

 other entering at the Chiputucticook Lakes at the head 



