CONTENTS 



Pag* 



Proceedings of the Thirty-fourth Annual Meeting of the 

 Geological Society of America, held at Amherst, Massa- 

 chusetts, December 28-30, 1 92 I 1-186 



Constitution, By-Laws, and Rules of Publication - - - - 1 62- 1 72 



Officers, Correspondents, and Fellows of the Society - - - 173-186 



Proceedings of the Twentieth Annual Meeting of the Cor- 

 dilleran Section of th); Geological Society of America, 

 held at Berkeley, California, March 26, 1921 - - - 187-190 



Proceedings of the Thirteenth Annual Meeting of the Pale- 

 ontological Society, held at Amherst, Massachusetts, 

 December 28-30, 1921 ----- 191-222 



Proceedings of the First Annual Meeting of the Society of 

 Economic Geologists, held at Amherst, Massachusetts, 

 December 28-30, 1921 - - - - - 223-226 



Proceedings of the Second Annual Meeting of the Mineral- 

 ogical Society, held at Amherst, * Massachusetts, De- 

 cember 29, 1921 - ----- • - 227-230 



After-effects of Igneous Intrusion. Presidential Address by 



James F. Kemp - - \- - - 231-254 



Some Problems Connected with the Dakota Sandstone. 



Presidential Address by Timothy W. Stanton - - - 255-272 



BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 



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