22 GEOLOGY OF MOOSE RIVER GOLD DISTRICT — WOODMAN. 



The field studies occupied parts of several seasons. When the 

 first survey was made, in 1897, no maps of the district had 

 been published ; but within a few months the mining map by 

 Mr. E. R. Faribault appeared [Geol. surv. Can., doc. no. 646 ; 

 scale 1 : 6,000]. I am much indebted to this for the positions of 

 certain veins which have not been worked since the present 

 study began, and for checks upon certain other features. The 

 map in this paper is more detailed than is customary, even in 

 large-scale mining maps, in its attempt to locate the axes of the 

 several folds ; and has the benefit of a number of excavations 

 which were unfortunately not opened when the earlier plan was 

 published. It is a pleasure to note that, while pi. 2 differs in 

 many details from the government map, the later work confirms 

 in the main the general results of Mr. Faribault's survey. This 

 last is to be expected ; as his painstaking work has invariably 

 resulted in valuable maps of the anticlinal domes. 



Inasmuch as this is a field study, petrographic and 

 chemical aids have been employed only as far as was necessary 

 for the main purposes of the paper ; and many interesting pro- 

 blems involving their use have been neglected. It will be 

 noticed also that the larger theoretical questions are not included 

 in the following pages, except for a partial summary at the end. 

 This is because the length of the paper would be increased 

 unduly, were they treated in full ; and the alternative is to 

 be followed of presenting a discussion of the general problems 

 arising from the study, in subsequent detached papers. 



Nomenclature. — Throughout more than a half -century of 

 study of the gold-bearing series, no distinct geological names 

 have been used for it and its subdivisions. Almost simultaneously 

 with this paper another has been published, proposing a remedy 

 (Am. Geol, vol. xxxiii) ; aad the nomenclature of that paper will 

 be employed by me in this and subsequent contributions to the 

 geology of the series. The gold-bearing series as a whole is 

 there called the Megwma series ; the lower, quartzite, or gold- 



