BULLETIN OF THE GEOLOGICAL SOCIETY OF AML 

 Vol. 27, pp. 1-138, pls. 1-9 March 30, 1916 



PROCEEDINGS OP THE TWENTY-EIGHTH ANNUAL MEET- 

 ING OF THE GEOLOGICAL SOCIETY OP AMERICA, HELD 

 AT WASHINGTON, DISTRICT OF COLUMBIA, DECEMBER 



28, 29, AND 30, 1915. 



Charles P. Berkey, Secretary pro tern. 



CONTENTS 



Page 



Session of Tuesday, December 28 5 



Report of the Council 5 



Secretary's report 5 



Treasurer's report 7 



Editor's report 9 



Election of Auditing Committee 11 



Election of officers 11 



Election of Fellows 12 



j/' Memorial of Theodore B. Comstock (with bibliography) ; by Heinrich 



Ries 12 



!/ Memorial of Orville A. Derby (with bibliography) : by J. C. Branner. 15 

 j/" Memorial of Joseph Austin Holmes (with bibliography); by J. H. 



Pratt 22 



V Memorial of William John Sutton ; by W. F. Robertson 35 



y' Memorial of A. B. Willmott (with bibliography) ; by A. I'. Coleman.. 37 

 Titles and abstracts of papers presented before the morning session 



and discussions thereon 38 



Geographic history of the San Juan Mountains since the close of 

 the Mesozoic era [abstract] ; by Wallace W. Atwood and Hart- 

 ley W. Mather 38 



Dominantly fluviatile origin, under seasonal rainfall, of the old 



red sandstone [abstract] ; by Joseph Barrell 39 



Influence of Silurian-Devonian climates on the rise of air-breath- 

 ing vertebrates [abstract] ; by Joseph Barrell 40 



Some littoral and sublittoral physiographic features of the Virgin 

 and northern Leeward Islands and their bearing on the coral- 

 reef problem [abstract] : by Thomas Wayland Vaughan 41 



Coral-reef problem [abstract] ; by W. M. Davis 46 



Tertiary-Quaternary orogenic history of the Sierra Nevada in the 

 light of recent studies in the Yosemito region [abstract] : by 



F. E. Matthes 16 



Titles and abstracts of papers presented before the afternoon session 



and discussions thereon 47 



I — Bull. Geol. Soc. Am., Vol. 27. 1015 (1) 



