CONTENTS 



Page 



Aigonkian formations of northwestern Montana ; by Charles D. Walcott .... 1 

 Recent changes of level in the Yakutat Bay region, Alaska ; by Ralph S. Tare 



and Lawrence Martin 29 



Carboniferous of the Appalachian basin ; by John J. Stevenson 65 



Paleogeography of Saint Peter time ; by Charles P. Berkey 229 



Glacial phenomena of the San Juan mountains, Colorado ; by Ernest Howe 



and Whitman Cross 251 



Geology of the lower Colorado river ; by Willis T. Lee 275 



Guaclix formation of Granada, Spain ; by William Herbert Hobbs 285 



Cretaceous section in the Moose Mountains district, southern Alberta ; by D. B. 



Dowling 295 



Crescentic gouges on glaciated surfaces ; by G. K. Gilbert 303 



Moulin work under glaciers ; by G. K. Gilbert 317 



Gravitational assemblage in granite ; by G. K. Gilbert 321 



The Okanagan composite batholith of the Cascade Mountain system ; by Reg- 

 inald A. Daly 329 



Observations in South Africa ; by W. M. Davis 377 



Geological reconnaissance of the coast of the Olympic peninsula, Washington ; 



by Ralph Arnold 451 



Geology of Diamond head, Oahu ; by C. H. Hitchcock 469 



Mohokea Caldera ; by C. H. Hitchcock 485 



Igneous rocks of the eastern townships of Quebec ; by John A. Dressler 497 



Lithological character of the Virginia Granites ; by Thomas Leonard Watson . 523 

 Fish remains in Ordovician rocks in Bighorn mountains, Wyoming, with a 



resume of Ordovician geology of the northwest ; by N. H. Darton , 541 



Types of sedimentary overlap ; by Amadeus W. Grabau 567 



Interdependent evolution of oases and civilizations. Presidential address by 



Raphael Pumpelly 637 



Proceedings of the Eighteenth Annual Meeting, held at Ottawa, Canada, Decem- 

 ber 27, 28, and 29, including Proceedings of the Seventh Annual Meeting of 

 the Cordilleran Section, held at Berkeley, California, December 29 and 30, 



1905 ; Herman Le Roy Fairchild, Secretary 671 



Session of AVednesday, December 27 672 



Report of the Council 673 



Secretary's report 673 



Treasurer' s report 675 



Editor's report 677 



Librarian' s report 679 



Election of officers 679 



Election of Fellows 680 



Amendment to Constitution 681 



Memoir of George H. Eldridge [with bibliography] ; by Whitman 



Cross 681 



iii 



