Index to Volume XXVII 



Abendanon, E. C. Aequinoctia, an Old Paleozoic Continent . 562 



Accuracy of the Rosiwal Method for the Determination of the Minerals 



in a Rock, On the. By Albert Johannsen and E. A. Stephenson 212 



Aequinoctia, an Old Paleozoic Continent. By E. C. Abendanon . 562 



Ammonoids of the Glass Mountains, West Texas, and Their Strati- 

 graphical Significance, The Permo-Carboniferous. By Emil Bose. 

 Review by James Perrin Smith 132 



Barrell, Joseph, and His Work. Editorial. By Bailey Willis . 664 

 Beartooth Plateau, Wyoming, Glacial Features on the South Side of. 



ByC. L. Dake 128 



Bose, Emil. The Permo-Carboniferous Ammonoids of the Glass Moun- 

 tains, West Texas, and Their Stratigraphical Significance. Review 



by James Perrin Smith 132 



Bowen, N. L. Crystallization-Differentiation in Igneous Magmas . 393 



Branson, E. B. Geology of Missouri. Review by R. D. S. . . 136 

 Bretz, J Harlen. The Late Pleistocene Submergence in the Columbia 



Valley of Oregon and Washington 489 



Bryan, Kirk. Classification of Springs 522 



Buddington, A. F. Pre-Cambrian Rocks of Southeast Newfoundland 449 

 Building of the Colorado Rockies, The. By RoUin T. Chamberlin 145, 225 



ChamberUn, Rollin T. A PecuMar Belt of ObUque Faulting . . . 602 



-. The Building of the Colorado Rockies .... 145, 225 



Chamberlin, T. C. Investigation versus Propagandism . . . . 305 



Classification of Springs. By Kirk Bryan 522 



Coarse Gabbroid Diabase in Westfield, Massachusetts, On. By Earl 



V. Shannon 579 



Cobble Abrasion, A Laboratory and Field Study of. Preliminary 



Report. By C. K. Wentworth 507 



Colorado Rockies, The Building of the. By RoUin T. ChamberUn 145, 225 



Columbia Valley of Oregon and Washington, The Late Pleistocene Sub- 

 mergence in the. By J Harlen Bretz 489 



Connecting Link between the Geology of the Northern Shan States 



and Yunnan, A. By M. H. Loveman 204 



Cooke, H. C. Some Stratigraphic and Structural Features of the Pre- 

 Cambrian of Northern Quebec 65,180,263,367 



"Cordilleran Glacier" in British Columbia, Was There a? By J. B. 



Tyrrell 55 



675 



