ABSTRACTS OF PAPERS 51 



GLACIAL SECTION AT CALGARY, ALBERTA 

 BY EDWARD M. BUBWASH 



{Abstract) 



1. General physiogi-aphic description of the locality. 



2. Relation of Glacial deposits in tlie physiographic development and location 



of section studies. 



3. Description of section : 



(«) Lower till. 



(6) Interglacial sediments. 



(c) Upper till. 



4. Comparison with coast section. 



5. General inferences. 



Eeacl by title at the request of the author. 



President White withdrew, after calling Vice-President A. C. LaAVSon 

 to the chair. 



A LATE PLEISTOCENE READVANCE OF THE ICE-SHEETS IN THE VANCOUVER 

 REGION, BRITISH COLUMBIA 



BY W. A. JOI-INSTON 



(Adstract) 



Investigation during the past summer in the Vancouver region. British Co- 

 umbia, has shown that a marine horizon occurs in the Pleistocene deposits at 

 various places and at various heights up to 250 feet above sealevel. The ma- 

 rine deposits are overlain in -places by till and in other places by outwash de- 

 posits and stratified silt and clay. They are younger than a till which overlies 

 the Admiralty sediments and Admiralty till, as referred to by E. M. Burwash. 



The field evidence and probable significance of the occurrence is briefly dis- 

 cussed. 



Eead from manuscript. 



The paper was discussed b\' Prof. George F. Kay, Dr. J. Harlen Bretz, 

 and Dr. E. ]\I. Burwash, with replies hy the author. 



Discussion 



Dr. .T. Harlen Bretz : A shell-bearing clay, associated with sand and gravel, 

 lies between two till sheets in the northern part of Whatcom County, Wash- 

 ington, not more than twenty miles south of the international boundary. These 

 till sheets lie above the Admiralty sediments, and apparently record two ad- 

 vances of the Vashon ice-sheet over northern Whatcom County and the pres- 

 ence of the sea there during the interval between these two episodes. A mar- 

 ginal moraine, one of the most prominent in the glaciated area of western 

 Washington, lies just south of the region of the shelly clay between till sheets. 

 It apparently is the record of the southernmost limit reached by this readvance 

 of the Yashou ice. 



