DEEP MINING IN NOVA SCOTIA — P REST. 425 



Another distinguishing- feature of the western counties is the 

 existence of a multitude of minor folds intermingled with the 

 larger gold-bearing anticlines. This is noticed particularly in 

 the coast and central districts of Lunenburg Co. In Halifax and 

 Guysboro' Counties we have very few of these minor folds. 



Now let us consider the cause of this difference of form shown 

 by the folds of the eastern and western Counties. We see the 

 eastern folds, long, narrow, parallel, and steeply inclined, occupy- 

 ing a part of the province comparatively distant from continental 

 influences, pent between the ocean and the Pre-cambrian of the 

 Cobequids, and subject to lateral forces from the north and south, 

 but free to prolong their eastern extensions indefinitely. Thus 

 we can trace in their conformation and position the formative 

 influences that gave them birth. 



The western folds short, broad, distributed irregularly, and 

 less steeply inclined, were more within the sphere of continental 

 influences. Thus we see them acted upon in a lesser degree by 

 the same forces as in the eastern counties, but also strongly 

 influenced by a centre of resistance on the west. This centre, 

 apparently the Adirondacks, was also the cause of the elevation 

 of the older rocks of the north-eastern states The domes and 

 ellipses of the western counties show the effects of this additional 

 pressure in various ways : 



1st In the gradually increasing south-westerly trend of the 

 ellipses as we go west ; 



2nd. In the deeper and wider cross synclines ; 



3rd. In the rounder forms of the domes, showing a more 

 equalized pressure ; 



4th. In the great prevalence of north and south, and the 

 absence of east and west, faults ; 



5th. In the gradual south-westerly trend and parallelism of 

 the trough-like depression of the Bay of Fundy. 



As to the time when this folding took place there is no precise 



information. It is, however, definitely limited by, and older than 



the granite metamorphism of Lower Devonian times. The 



Oriskany of Bear Kiver is thought to be folded in by the Cam- 



5 



