164 DisTRiHrnoN of bedded leads 



we have yet to prove that any of them were formed after tlie 

 manner of " true fissure veins " — tliat is, by wide-spread and 

 deep-seated disruption of tlie rocks ; and second, whatever some 

 of tlie cross veins may be, others give distinct evidence of not 

 occupying true fissures, but only shrinkage or torsion cracks due 

 to local influences, and confined in strike definitely to a certain 

 portion of the strata, dying out at either end as other strata are 

 reached. 



Third, in one sense all are fissure veins ; that is, all were 

 formed in pre-existing cavities or places of weakness. 



The present paper undertakes only to consider some charac- 

 teristics of the mineral deposits under group one. Certain of 

 these have been emphasized, chiefly verbally, by Mr. E. R. Fari- 

 bault, of the Geological Survey of Canada. It is difficult to 

 speak too highly of Mr. Faribault's work, extending over* a long 

 term of years, and carried on patiently under most trying con- 

 ditions, not the least of which has been a totally inadequate 

 supply of funds. 



Here the author begs indulgence for a momentary disgres- 

 sion. We are accustomed to grumble at the amount of study 

 alloted to this province by the Geological Survey. Observation 

 of work done in other parts of the Dominion convinces me that, 

 in proportion to its apparent economic importance, Nova Scotia 

 has received in the past, and is still accorded, more attention 

 from the surveying staff" than any other part of Canada. The 

 Maritime Provinces are the only considerable division for which 

 were early planned, and are now being executed, inch-to-mile 

 geological sheets. Other regions liave been mapped upon this 

 scale, or even a larger one ; but they are limited in extent, and 

 generally embrace s6me distinct economic district, covered by a 

 few map sheets. Except the parts now in progress of being 

 surveyed, the areal geology of the province is mapped already, 

 in a manner not perfect, it is true, but eminently satisfactory 

 when the financial resources at connuand are considered. What 

 the Survey does not do, is to attempt problem studies of geo- 



