CONTENTS 



Page 



Concentration as a geological principle ; by Israel C. Russell 1 



Carboniferous of the Appalachian basin ; by John J. Stevenson .• 29 



Galena series ; by Frederick W. Sardeson 179 



Structure and correlation of Newark trap rocks of New Jersey ; by J. Volney 



Lewis 195 



Afton craters of southern New Mexico ; by Willis T. Lee 211 



Conditions of circulation at the sea mills of Cephalonia ; by Myron L. Fuller . 221 

 Origin of ocean basins in the light of the new seismology ; by William H. 



HoBBs 233 



Cave-sandstone deposits of the southern Ozarks ; by A. H. Purdue 251 



Recent advance of glaciers in the Yakutat Bay region, Alaska ; by Ralph S. 



Tarr 257 



Uinta mountains ; by S. F. E.mmons 287 



Volcanic necks of the Mount Taylor region, New Mexico ; by D. W. Johnson. 303 

 Stratigraphic succession in the region northeast of Cook inlet, Alaska ; by 



Sidney Paige and Adolph Knopf 325 



Lateral erosion on some jMichigan rivers ; by Mark Jefferson 333 



Some characteristics of the glacial period in non-glaciated regions ; by Ells- 

 worth Huntington 351 



A theory of continental structure applied to North America ; by Bailey 



Willis 389 



Glacial erosion in the Northfiord ; by Mark Jefferson 413 



Stratigraphy and structure of the Uinta range ; by F. B. Weeks 427 



Origin and significance of the Mauch Chunk shale ; by Joseph Barrell 449 



Asymmetric differentiation in a bathylith of Adirondack syenite ; by H. P. 



CUSHING 477 



Origin of meteor crater (Coon butte), Arizona ; by H. L. Fairchild 493 



Complexity of the glacial period in northeastern New England ; by Frederick 



G. Clapp 505 



Proceedings of the Nineteenth Annual Meeting, held at New York, N. Y., De- 

 cember 27, 28, and 29, including Proceedings of the Eighth Annual Meeting 

 of the Cordilleran Section, held at Stanford University, California, December 



28 and 29, 1906 ; Edmund Otis Hovey, Secretary 557 



Session of Thursday, December 27 559 



Report of the Council 559 



Secretary' s report 559 



Treasurer's report 564 



Editor's report 568 



Librarian's report 568 



Election of officers 569 



Election of Fellows 570 



Memoir of William Buck Dwight ; by F. J. H. Merrill 571 



Memoir of Samuel Lewis Penfield [with bibliography] ; by Joseph 



P. Iddings 572 



Memoir of Israel C. Russell [with bibliography] ; by Bailey Willis. 582 

 Memoir of Nathaniel Southgate Shaler [with bibliography] ; by John 

 E. Wolff 592 



