ABSTRACTS OF PAPERS 145 



The two following papers on the stratigraphy and paleontology of the 

 Canadian Cordillera were presented together by Mr. Burling, who illus- 

 trated them by diagrams and maps. Eesults of this stratigraphic work 

 by Mr. Drysdale and Mr. Burling, the former of whom lost his life in 

 this field-work, were discussed by Messrs. Parks, Grabau, and Burling. 



ROCKY MOUNTAINS SECTION IN THE VICINITY OF WHITEMANS PASS 

 BY C. W, DRYSDALE AND L. D. BURLING 



(Ahstract) 



This paper will describe the results of the fatal reconnaissance trip under- 

 taken by the late Mr. Drysdale and the writer during the early part of the 

 last field season. 



The line of section begins west of Cochrane, Alberta, and proceeds in an 

 almost straight southwesterly direction across Whitemans Pass to a point on 

 the Kootenay River east of the Windermere mining district of British Columbia. 



The region traversed by the section, which crosses the strike of the rocks, is 

 broken into a series of longitudinal blocks, each shoved over its neighbor to 

 the east and all more or less similarly tilted. The fossils secured show the 

 thrust-faults between to be of large magnitude, but they coincide so largely 

 with the valleys and with the strike and the local folding in their vicinity is 

 so subordinate that the presence of faulting has not been recognized. Dawson 

 is the only geologist who has made a previous crossing. 



FURTHER LIGHT ON THE EARLIER STRATIGRAPHY OF THE CANADIAN 



CORDILLERA 



BY LANCASTER D. BURLING 



(Ahstract) 



This paper will deal with some of the more important of the discoveries of 

 the 1917 field season. 



New evidence was secured bearing on the question of the age relationships 

 of the Lower Cambrian and Beltian rocks of British Columbia, Alberta, and 

 Montana. 



Careful search in the so-called "Castle Mountain" limestones at the head of 

 Nyack Creek, Montana, yielded abundant casts of salt crystals, but no fossils. 

 Their Siyeh age is almost unquestioned. 



The Mount Robson region was visited and collections secured from many 

 horizons, all the Cambrian and Ordovician formations above the lowest quartz- 

 itic sandstones being represented. Many doubtful points in the stratigraphy 

 were cleared up — such, for example, as the true position of the Extinguisher 

 ("Billings Butte") fauna, etcetera. Evidence secured would seem to indicate 

 that while the Callavia and Olenellus zones are hardly to be separated as such 

 in this region, Callavia does appear alone in the section first, later mingles 

 with Olenellus. and finally disappears, leaving Olenellus alone. 



The A Ibertella fanna was traced to the north, sonth, and east and further 



