BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 

 Vol. 1, pp. 1-86. pl. 1 February 15, 1890 



ORGANIZATION OF THE GEOLOGICAL SOCIETY OF AMERICA 



PROCEEDINGS OF THE SEMI-ANNUAL MEETING HELD AT 

 TORONTO, AUGUST 28-29, 1889 



PAPERS READ AT THE TORONTO MEETING 



J. J. Stevenson, Secretary 



CONTENTS 



Page 



Organization of the Geological Society of America 1 



Historical Sketch of the Organization 1 



Provisional Constitution and By-laws 7 



Proceedings of Meeting for Final Organization at Ithaca '.1 



Proceedings of the Semi-Annual Meeting at Toronto 1 "1 



Opening Address by the President, James HalL_^ 15 



Revision of the Genus Orthis (abstract) ; by James Hall 19 



New Genera and Species of Dictyospongidse (abstract) ; by James Hall . 22 



The Strength of the Earth's Crust (abstract) ; by G. K. Gilbert 28 



Boulder Belts and Boulder Trains (abstract) ; by T. C. Chamberlin 27 



Trap Dikes near Kennebunkport, Maine (abstract); by J. F. Kemp .__. 31 



The Sylvania Sand in Cuyahoga County, Ohio; by Peter Neff 82 



Areas of Continental Progress in North America; by James D. Dana 36 



Study of a Line of Displacement in the Grand Canon ;. by C. D. Walcott 49 



High Continental Elevation preceding the Pleistocene; by J. W. Spencer . G5 

 Ancient Shores, Boulder Pavements, and High-Level Gravels (with PI. I); 



by J. W. Spencer ---- " 



ORGANIZATION OF THE GEOLOGICAL SOCIETY OF 



AMERICA. 



HISTORICAL SKETCH OF THE ORGANIZATION.* 



Geological science early assumed, in America, the form of organized 

 activity. Various societies of local scope were initiated in the early part of 



♦Prepared by Prof. Alexander Winchell, in accordance with the request ol the Council. 

 I— Bull. Geol. Soc. Am., Vol. 1, 1889. 



