MINERAL OCCURRENCES 119 



Lithographic Stone 



A fine grained limestone that makes an excellent lithogra^phic stone 

 has been quarried on lots 7 and 8, concession v of Madoc. Owing to 

 the limited market in Canada, production has not, as yet, been under- 

 taken on a commercial scale. 



Sodalite 



On lot 25, concession xiv of Dungannon, some considerable develop- 

 ment work and quarrying have been done on a body of sodalite, which 

 it is intended to work extensively for a decorative stone. This mineral 

 which has a beautiful blue colotir, ranging from a dark shade to a very 

 pale blue, takes a high polish, and is eminently fitted to be used as 

 ornamental stone of Mgh grade. 



In this deposit of sodalite, more particularly near the edges where 

 it merges into the nepheline rocks, there are patches of aventurine 

 feldspur or stmstone, which can be polished and used as a semi-precious 

 stone. 



Immediately south of the above, there is another occurrence of 

 sodalite on lot 25, concession xiii, township of Dimgannon. 



