90 PROCEEDINGS OF THE SAINT LOUIS MEETING 



Dr. Eliot Blackwelder : Adverse criticism of our colleagues is always dis- 

 agreeable, but in such a case as this it becomes a duty. It seems to me that 

 Doctor Rich has done us a service in analyzing the arguments relating to the 

 alleged Eocene peneplain of the Northwest. I have followed this matter for 

 several years and have been to some extent involved in the controversy. In 

 my opinion, Doctor Rich is correct in his conclusions. 



Eemarks were also made b}- Dr. L. G. Westgate. 



IRON FORMATION ON BELCHER ISLANDS, HUDSON BAY, WITH SPECIAL 

 REFERENCE TO ITS ORIGIN AND ITS ASSOCIATED ALGAL LIMESTONES 



BY E. S. MOORE 



{Abstract) 



The Belchers are a group of large islands, nearly 100 miles in length, lying 

 about 70 miles northwestward from the mouth of Great Whale River, Hudson 

 Bay. They were little known until three years ago, when large areas of jas- 

 pilite were discovered on their shores. The sedimentary series, with the asso- 

 ciated igneous intrusions and extrusions, is related to the group on the east 

 coast of Hudson Bay and bears a close resemblance to the Animikie and 

 Keweenawan rocks of the Lake Superior region. They show, however, a re- 

 markable development of algal structures, which indicates either that these 

 rocks are younger than the Precambrian or that an abundance of life of low 

 type existed in the Hudson Bay basin during Precambrian time. Since the 

 iron formation contains outlines of weathered globular granules, it seems 

 probable that the algae may have had a part in precipitating iron carbonate 

 and silica in concretionary form. 



Read by title in the absence of the author. 



The Society adjourned soon after noon and reconvened at 2.30 p. m., 

 with Dr. J. M. Clarke in the chair. 



The Society proceeded immediately to the consideration of scientific 

 papers. 



TITLES AND ABSTRACTS OF PAPERS PRESENTED BEFORE THE AFTERNOON 



SESSION OF FRIDAY 



SUBPROVINCIAL LIMITATIONS OF PRECAMBRIAN NOMENCLATURE IN THE 

 SAINT LAWRENCE BASIN 



BY M. E. WILSON 



(Abstract) 



The detailed geological work carried on in recent years throughout the 

 southern part of the Canadian Precambrian shield has shown that the geo- 

 logical succession in the ancient terranes of this territory is regionally less 

 uniform and includes a greater number of rock series than was formerly sup- 



