VOLUME XXVll 



NUMBER 3 



THE 



Journal of Geology 



A Semi-Quarterly 



Edited fev 



THOMAS C. CHAMBERLIN AND' ROLLIN D. SALISBU! 



With the Active Collaboration of 



STUART WELLER, Invertebrate Paleontology ALBERT JOHANNSEN, Petrology 



ROLLIN T. CHAMBERLIN, Dynamic Geology 



ASSOCIATE EDITORS 



SIR ARCHIBALD GEIKIE, Great Britain 



CHARLES BARROIS, France 



ALBRECHT PENCK, Germany 



HANS REUSCH, Norway 



GERARD DeGEER, Sweden 



T. W. EDGEWORTH DAVID, Australia 



BAILEY WILLIS, Leland Stanford Junior University 



CHARLES D. WALCOTT, Smithsonian Institution 



JOSEPH P. IDDINGS, Washington, D.C. 



JOHN C. BRANNER, Leland Stanford Junior University 

 RICHARD A. F. PENROSE, Jr., Philadelphia, Pa. 

 WILLIAM H. HOBBS. University of Michigan 

 FRANK D. ADAMS, McGill University 

 CHARLES K. LEITH, University of Wisconsin 

 WALLACE W. ATWOOD, Harvard University 

 WILLIAM H. EMMONS, University of Minnesota 

 ARTHUR L. DAY, Carnegie Institution 



APRIL-MAY 1919 



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 iSo 



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 



THE UNIVERSITY OF CHICAGO PRESS 



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