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portions as to rank almost as mountain ridges, as can be seen in Wolfes- 

 town and Coleraine, and in Gaspe in certain parts of the Shickshock 

 range. As pointed out last year in an excellent paper " on the serpen- 

 tines of Canada," contributed by Mr. N. J. Giroux, of the Geological 

 Survey to this club, these peculiar rocks are found in formations of 

 different ages from the Laurentian to the Tertiary. To the latter period 

 some of those found in British Columbia are supposed by Dr. G. M. 

 Dawson to belong, while others are there associated with rocks of Car- 

 boniferous age. It is evident, therefore, that they have a very wide 

 geological range; and this is seen, also, in the province of Quebec, where 

 the serpentinous limestones north of the Ottawa are of Laurentian age, 

 while the serpentine east of the St. Lawrence is associated with rocks of 

 Huronian, Cambrian, and possibly even newer systems. Whether this 

 difference in the age of the serpentine formations may have any influ- 

 ence on the question as to the presence or otherwise of asbestus in work- 

 able quantity is a question not yet fully ascertained, but there is some 

 reason to suppose that the serpentines of a certain age are more pro- 

 ductive of cbrysotile in paying quantity, than that of more recent date 

 in this country, in the same way that the quartz veins of the Cambrian 

 rocks appear to be the seat of more productive gold mines than those 

 found in newer formations. 



The serpentinous rocks of New Brunswick have not as yet yielded 

 asbestus except as mere thread like veinings. These are found to belong 

 to the Laurentian system. In Nova Scotia it has not yet been recog- 

 nized, but recent investigations in northern Ontario, according to the 

 report of the Royal Mining Commission for that province lately pub- 

 lished, indicate the presence of fibrous asbestus in the vicinity of Lake 

 Temogan.i, according to the statement of Mr. R. Haycock, in veins of 

 considerable length. This is in rock also supposed to be of Huronian 

 age. 



The serpentine areas of the Eastern Townships may be divided 

 into three portions, viz. : 1st, a southern, embracing the masses in 

 Potton, Sutton, Bokon, Otford, Melbourne and Shipton, which termi- 

 nates not far from the Shipton Pinnacle, south of the village of Dan- 

 ville, though occasional detached outcrops appear above the surface for 

 a lew miles further north ; 2nd, a central portion beginning with Big 



