Contents of Volume XXVII 



NUMBER I 



PAGE 



The Geology of North Dakota. A. G. Leonard .... i 

 Pegmatite, Silexite, and Aplite oe Northern New York. Wil- 

 liam J. Miller 28 



Was There a "Cordilleran Glacier" in British Columbia? 



J.B.Tyrrell 55 



Re\iews 61 



Recent Publications t^ 



NUMBER II 



Some Stratigraphic and Structural Features of the Pre- 



Cambrian of Northern Quebec. I. H. C. Cooke ... 65 

 The Salient Features of the Geology of Oregon. Warren Dupre 



Smith and Earl L. Packard 79 



Some Subordinate Ridges OF Pennsylvania. Harry N. Eaton . 121 

 Glacial Features on the South Side of Beartooth Plateau, 



Wyoming. C. L. Dake . 128 



Reviews 132 



Recent Publications .138 



NUMBER III 



The Building of the Colorado Rockies. I. Rollin T. Chamberlin 145 

 Notes on the Geology of Georgia. S. W. McCallie . . 165 



Some Stratigraphic and Structural Features of the Pre- 



Cambrian of Northern Quebec. II. H. C. Cooke . . . 180 

 A Connecting Link between the Geology of the Northern Shan 



States and Yunnan. M. H. Loveman 204 



On the Accuracy of the Rosiwal Method for the Determination 



OF THE Minerals in a Rock. Albert Johannsen and E. A. 



Stephenson 212 



Reviews 221 



Recent Publications . . 222 



