BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 

 Vol. 32, pp. 1-118, PL. 1 March 31, 1921 



PEOCEEDINGS OF THE TIIIRTY-THIED ANNUAL MEETING 

 OF THE GEOLOGICAL SOCIETY OF AMERICA, HELD AT 

 CHICAGO, ILLINOIS, DECEMBER 28-30, 1920. 



Edmund Otis Hovey, Secretary 



CONTENTS 



Page 



Session of Tuesday, December 28 5 



Report of the Council 6 



Secretary's report 6 



Treasurer's report 9 



Editor's report 11 



Election of Auditing Committee 12 



Amendments to Constitution and By-Laws 13 



Election of officers for 1921 13 



Election of representatives on National Research Council .... .^^,»«<*fr^'-^-i, ^ ' 



Election of Fellows ^>«v^iP.^: ■^''i4' 



Changes in Publication Rules /C-3^ ^^ 



Support of the Geological Magazine / 16 , 



Necrology (:i^. . .]Uli . ^16 



Memorial of Joaquim Candido da Costa Sena (with bibliogf aphy ) ; by 



John C. Branner .X. ./d/. .,,. . 16 ,^v 



Titles and abstracts of papers presented at the morning sessib»^£^^ S ! ^]^z^^,.=^^ 



discussions thereon 18 



General statement on the work of the Committee on Sedimenta- 

 tion, Division of Geology and Geography, National Research 



Council [abstract] ; by T. Wajdand Vaughan 19 



Studies of sedimentation in the universities of the eastern part 



of the United States [abstract] : by E. S. Moore 19 



Studies of sedimentation in the universities of the central part 



of the United States [abstract] ; by W. H. Twenhofel 20 



Studies of sedimentation in the universities of the western part 



of the United States [abstract]; by G. D. Louderhack 20 



Some problems of sedimentation studies suggested by State geol- 

 ogists [abstract] ; by J. A. Udden 20 



Chronology in geology [discussion]; by J. A. Udden 21 



Chemical and physical researches on sedimentation [abstract] ; 



by Roger C. Wells 2.S 



Field description of sediments [abstract]; by M. I. Goldman.... 24 

 Preparation of a treatise on sedimentation [abstract! ; by W. H. 



Twenhofel 24 



I — Bull. Gkol. Soc. Am., Vol. oJ, 10:l'u (1) 



