367 



oxygen, and a trace of sulphur. The mineral occurs 

 filling fissures, usually narrow, not only in the Albert series 

 but in younger Carboniferous strata. Most of the reported 

 occurrences of such veins have been within a radius of a 

 few miles from Albert Mines. The only large vein ever 

 discovered was that occurring at Albert Mines. This vein, 

 it is said, was mined over a distance of about | mile (o- 8 km.), 

 and to a depth of i,ioo feet (330 m.) or more, beyond which 

 it became too narrow to be profitably worked. The vein 

 was nearly vertical and followed an almost straight course 

 along the general direction of the anticlinal axis in the 

 country rock, but varied in width up to 15 feet (4-5 m.) 

 and sent apophyses into the adjoining strata. 



Regarding the origin of the albertite, "oil-shales", and 

 natural gas and petroleum occurring in the accompanying 

 sandstones as developed in the Stony Creek oil fields, 

 two general views have been held. On the one hand, it 

 has been thought that the various hydro-carbons are of 

 secondary origin, derived from sources outside of the 

 Albert series. The second view is that the hydro-carbons 

 are indigenous to the shales and that they have been 

 derived from organic matter entombed in the sediments. 

 This latter view of the origin of the hydro-carbons seems 

 particularly applicable to the known facts in connexion 

 with the Albert series. 



BIBLIOGRAPHY. 



1. Bailey, L. W., and Ells, R. W., Geol. Sur. Can., Report 



of Progress, 1876-77. 



2. Dawson, W. J Acadian Geology. 



3. Ells, R. W Dept. of Mines, Bituminous or Oil- 



Shales of New Brunswick and Nova 

 Scotia, 1910. 



4. Ells, S. C Geol. Surv. Can., Map 35A, 191 1. 



5. Kramm, H. E Geol. Surv. Can., Summary Report 



for 191 1. 



6. Lambe, L. M Geol. Surv. Can., Memoir No. 3, 



1910. 



7. Young, G. A Geol. Surv. Can., Summary Report 



for 191 1. 



