99 

 EXCURSION A 5. 



Asbestos Deposits of the Province 

 of Quebec. 



BY 



Robert Harvie. 



CONTENTS. 



PAGE 



Introduction loo 



General description of asbestos producing region.. . ioi 



Physical features ioi 



General geology 102 



Table of formations 104 



Thetford series 104 



Peridotite and serpentine 104 



Pyroxenite 105 



Gabbro 105 



Diabase 105 



Granite 106 



Structural relations 106 



Broughton series 108 



Economic geology 108 



Black Lake 1 10 



Rock types of the peridotite series no 



Occurrence and relations of asbestos veins in 



Mining and milling of the asbestos bearing rock. 113 



Chromite 114 



Thetford 116 



East Broughton 116 



Rock types 116 



Sills 117 



Bibliography 117 



35064— 7I 



