212 Williams — Geology of A risaig-Antigonish, District. 



Art. XXII. — Geology of Arisaig-Antigonish District, If ova 

 Scotia /* by Merton Y. Williams. 



(Contributions from the Paleontological Laboratory, Peabody Museum, 

 Yale University. — Abstract of a thesis presented to the Faculty of Yale Uni- 

 versity for the degree of Doctor of Philosophy, June, 1912.) 



Purposes of the investigation and scope of the article. 



During the summer of 1910 the writer and his assistant, 

 Mr. M. H. McLeod of Northeast Margaree, Cape Breton 

 Island, Nova Scotia, were engaged by the Geological Survey 

 of Canada to make a detailed examination and survey of an 

 area in northeastern Nova Scotia which it was hoped would 

 furnish critical data for the unravelling of the Paleozoic strati- 

 graphy of that part of the province. Pending the publication 

 by the Geological Survey of the complete report with maps, 

 the following summarized statement is offered as covering the 

 most important conclusions. 



A clcnowledgments. 



The writer wishes to acknowledge his indebtedness to Pro- 

 fessor Charles Schuchert of Yale University and Professor W. 

 H. Twenhofel of the University of Kansas for advice and 

 assistance during the early part of the field work. Thanks are 

 also due Professors L. V. Pirsson, Joseph Barrell, Isaiah Bow- 

 man, and J. D. Irving of the Geological Department of Yale 

 University, for assistance in the preparation of the report here 

 summarized. 



Location and extent of the, district. 



The Arisaig-Antigonish district of northeastern Nova Scotia 

 fronts on Northumberland Strait about one-third of the way 

 from Cape George to Pictou Harbor. From a water-front 10 

 miles long with Arisaig Point at its center, the district extends 

 inland 11 or 12 miles to the southeast, including the gypsum 

 deposits south of the Intercolonial Railway. The approximate 

 area studied is 115 square miles. 



Previous work. 



Geologically the region is classic as a result of the labors of 

 Sir J. William Dawsonf and the Bev. D. Honeyman^: in 



* Published by permission of the Director of the Geological Survey of 



+ Dawson, J. W., Acadian Geology, editions 1-4. 1855, 1868, 1878, 1891. 

 JHoneyman, D., Quart. Jour. Geol. Soc, London, xx, 1864; xxvi, 1870. 

 Trans. Nova Scotian Inst. Nat. Sci., 1866, 1882, 1886, 1887. 



