VOLUME XXVIII 



NUMBEK 3 



THE 



Journal of Geology 



A Semi-Quarterly 



Edited By 

 thomas c. chamberlin and rollin d. s 



With the Active Collaboration of 



STUART WELLER, Invertebrate Paleontology ALBERT JOHANNSEN 



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 Minnesot 

 ARTHUR L. DAY, Carnegie Institution 



APRIL-MAY 1920 



1 )MPILATION AND COMPOSITION OF BITUMINOUS COALS - Reinhardt Thiessen 185 



\ QUANTITATIVE MINERALOGICAL CLASSIFICATION OF IGNEOUS 



ROCKS— REVISED. PART III ------ Albert Johannsen . 210 



GEOLOGICAL SETTING OF NEW MEXICO Charles Keyes 233 



MOVEMENTS IN CRYSTALLIZING MAGMA - - - - - Frank F. Groux 255 



; DEFORMATION OF CRYSTALLIZING MAGMA - N. L. Bowex 265 



REVi'eWS - - 268 



RECENT PUBLICATIONS - . - - ..--...- 278 



THE UNIVERSITY OF CHICAGO PRESS 



CHICAGO, ILLINOIS, U.S.A. 



THE CAMBRIDGE UNIVERSITY PRESS, London 



THE MARUZEN-KABUSHIKI-KAISHA, Tokyo, Osaka, Kyoto, Fukuoka Sendai 



THE MISSION BOOK COMPANY, Shanghai 



