VOLUME XIX 



NUMBER 4 



THE 



Journal of Geology 



A Semi-Quarterly 



Edited By 



THOMAS C. CHAMBERLIN AND ROLLIN D! SALISBURY 



With the Active Collaboration of 



SAMUEL W. WILLISTON 



Vertebrate Paleontology 



STUART WELLER 



Invertebrate Paleontology 



ALBERT JOHANNSEN 

 Petrology 



WALTER W. ATWOOD 

 Physiography 



WILLIAM H. EMMONS 



Economic Geology 



ROLLIN T. CHAMBERLIN 

 Dynamic Geology 



ASSOCIATE EDITORS 



SIR ARCHIBALD GEIKIE, Great Britain 



HEINRICH ROSENBUSCH, Germany 



THEODOR N. TSCHERNYSCHEW, Russia 



CHARLES BARROIS, France 



ALBRECHT PENCK, Germany 



HANS REUSCH, Norway 



GERARD DeGEER, Sweden 



ORVILLE A. DERBY, Brazil 



T. W. EDGEWORTH DAVID, Australia 



BAILEY WILLIS, Argentine Republic 



GROVE K. GILBERT, National Survey, Washington, D.C. 

 CHARLES D. WALCOTT, Smithsonian Institution 

 HENRY S. WILLIAMS, Cornell University 

 JOSEPH P. IDDINGS, Washington, D.C. 

 JOHN C. BRANNER, Stanford University 

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

 WILLIAM B. CLARK, Johns Hopkins University 

 WILLIAM H. HOBBS, University of Michigan 

 FRANK D. ADAMS, McGill University 

 CHARLES K. LEITH, University of Wisconsin 



MAY- JUNE, 191 1 



CONTENTS 



MAGMATIC [DIFFERENTIATION IN HAWAII - - : - - Reginald A. Daly 289 



PETROGRAPHIC TERMS FOR FIELD USE -------- - Albert Johannsen 317 



THE EVOLUTION OF LIMESTONE AND DOLOMITE. I - - - Edward Steidtmann 323 



THEZRECURRENCE OF TROPIDOLEPTUS CARINATUS IN THE CHEMUNG FAUNA 



OF .VIRGINIA --------------------- E.,-M. Kindle 346 



FURTHER DATA ON THE STRATIGRAPHIC POSITION OF THE LANCE FORMA- 

 TION ("CERATOPS BEDS") -------------- F. H. Knowlton 358 



LARGE GLACIAL BOWLDERS ------------ George D. Hubbard 377 



REVIEWS ------------------ - . . . . s8l 



€tyz &nti)zt$ity of C^tcagd pvz$$ 



CHICAGO, ILLINOIS 



Agents: 



CAMBRIDGE UNIVERSITY PRESS,: London and Edinburgh 



WILLIAM WESLEY & SON, London 



TH. STAUFFER, Leipzig 



