Coleman — Nepheline and other Syenites in Ontario. 155 



The older neplieline or elaeolite rocks and their associates 

 can no longer be considered rare. In the province of Ontario 

 they are known to occur very widely spread in Dun^annon 

 and adjoining townships, where they were iirst noticed by Dr. 

 Adams, and where they have been followed up for many miles 

 by Professor Miller because of tlieir connection with the 

 corundum-bearing band of the Laurentian. The series of 

 eruptives described in this paper form another large mass of 

 nepheline syenites and related rocks, though of a very different 

 type ; and the malignites described by Dr. Lawson from 

 Foohbah Lake, west of Lake Superior, make a third, each with 

 ite own peculiarities differing markedly from the others. The 

 nepheline rocks of Montreal make another Canadian locality, 

 though on a small scale, and with their alnoite dikes, as 

 described by Dr. Adams, present still another type ; the whole 

 illustrating strikingly the great variability of this group of 

 plutonic and dike rocks as contrasted with most others. 



To refer to the areas described in the United States by 

 Pirsson, Washington, Osann and others, would lead too far ; 

 and a mere list of the localities in Europe, India, South 

 America, etc., would require considerable space. 



In concluding this notice of the Port Coldwell and Penin- 

 sula syenitic rocks, it should be mentioned that a number of 

 them are handsome ornamental stones, as proved by polished 

 specimens prepared by the Bureau of Mines for the Buffalo 

 Exposition, where they attracted considerable attention. The 

 dark gray augite syenite with its gleams of blue from the 

 feldspars is a particularly line stone, resembling the famous 

 N^orwegian syenite though on the whole finer in grain. As 

 it can be obtained close to the Canadian Pacific railway and 

 beside an excellent harbor on Lake Superior, in quarries afford- 

 ing blocks of almost any required dimensions, it should prove 

 of importance in the future. 



Toronto University, Toronto, Ontario, Canada. 



