BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 



Vol. 19, pp. 513-617, PLS. 33-41 JANUARY 30, 1909 



PEOCEEDINGS OP THE TWENTIETH ANNUAL MEETING, 

 HELD AT ALBUQUEEQUE, NEW MEXICO, DECEMBER 30 

 AND 31, INCLUDING PROCEEDINGS OF THE NINTH AN- 

 NUAL MEETING OP THE CORDILLERAN SECTION, HELD 

 AT THE SAME PLACE AND TIME. 



Edmund Otis Hovey, Secretary. 



CONTENTS 



Page 



Session of Monday, December 30 514 



Report of the Council 514 



Secretary's report 514 



Treasurer's report , 517 



Editor's report ^ 519 



Librarian's repoi't , 520 



Election of officers 521 



Election of Fellows 522 



Memoir of James Merrill Safford (with bibliography) ; by J. .7. Steven- 

 son 522 



Memoir of Angelo Heilprin (with bibliography) ; by Herbert E. Greg- 

 ory .527 



Chief features of the stratigraphy and structure of mount Diablo, 



California [abstract] ; by George D. Louderback 537 



Grenville-Hastings unconformity [abstract] ; by Willet G. Miller and 



Cyril W. Knight 539 



New Upper Silurlc fauna from southern Michigan ; by W. H. Sherzer 



and A. W. Grabau 540 



Nomenclature and subdivision of the Upper Siluric strata of Michigan, 

 Ohio, and western New York [abstract] ; by A. C. Lane, Charles S. 



Prosser, W. H. Sherzer, and A. W. Grabau 553 



Structure and stratigraphy of the Ouachita Ordovician area, Arkansas 



[abstract] ; by A. H. Purdue 556 



Session of Tuesday, December 31 557 



Notes on the Crazy mountains, Montana [abstract] ; by .John E. Wolff. 557 

 Glaciation in the Crazy mountains of Montana ; by George Rogers 



Mansfield 558 



Discovery of fish remains in Ordovician of the Black hills, South Da- 

 kota [abstract] ; by N. 11. Darton 567 



Benitoite : its mineralogy, paragenesis, and geological occurrence [ab- 

 stract] ; by George D. Louderback and W. C. Blasdale 560 



Geologic processes and geographic products of the arid region [ab- 

 stract] ; by Charles R. Keyes 570 



Committee on geological nomenclature 576 



XLVIII— Bull. Geol. Soc. Am,. Vol. 19, 1907 _ (513) 



