CONTENTS 



Pages 

 Progress of Opinion as to the Origin of the Lake Superior Iron Ores. 



By N. H. Winchell - - . 317-328 



Saponite, Thalite, Greenalite, Greenstone. By N. H. Winchell - 329-332 



Differential Erosion and Equiplanation in Portions of Yukon and 



Alaska. By De Lorme D. Cairnes .--- 333-348 



Conelation of the Paleozoic Faunas of the Eastport Quadrangle, Maine. 



By Henry Shaler WiUiams 349-356 



Development and Systematic Position of the Monticuliporoids. By 



H.R. Cumings ...-..__. 357-370 



Oriskany Sandstone of Ontario. By Clinton R. Stauffer - - - 371-376 



Criteria for the Recognition of Ancient Delta Deposits. By Joseph 



Barrell ^ 377-446 



A Mississippian Delta. By E. B. Branson 447-456 



Boulder Beds of the Caney Shales at Talihina, Oklahoma. By J. B. 



Woodworth - - 457-462 



Pre- Wisconsin Channels in Southeastern Soulh Dakota and North- 

 eastern Nebraska. ByJ. E.Todd 463-470 



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