BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 



Vol. 19, pp. 99-112, PLS. 6-8 JULY 10, 1908 



PEOBABLE AGE OF THE MEGUMA (GOLD-BEAEING) SEEIES 



OF NOVA SCOTIA^ 



BY J. EDMUND WOODMAN 



(Read before the Society December 28, 1906, and presented by title 



December 30, 1907) 



CONTENTS 



Page 



Introduction 99 



History of opinions 100 



Evidence 101 



Graphite 101 



Lime 102 



History of recorded "fossils" 102 



Probable inorganic character of the fossils 103 



Fossils : Markings at Greenbank, Halifax 104 



Concretions 104 



Lithological resemblances and bedded veins 106 



Unconformities 106 



Composition of younger rocks 107 



Comparative structures 108 



Thickness 109 



Intrusives 109 



Correlation with other groups 110 



Conclusions Ill 



References Ill 



Introduction 



The gold-bearing rocks of the mainland of Nova Scotia have been 

 under examination for more than fourscore years. Their structure and 

 the methods of occurrence of their veins and the included metal have 

 been studied in considerable detail; but from the earliest speculation of 

 Gesner to the latest papers, references to the age of the series have been 

 either vague or dogmatic without the requisite evidence to substantiate 

 the statement. In recent years authors have for the most part been satis- 



' Manuscript received by the Secretary of the Society February 1, 1908. 



XI— Bull. Geol. Soc. Am., Vol. 19, 1907 (99) 



