VOLUME XXX 



NUMBER 6 



THE 



Journal of Geology 



A Semi-Quarterly 



Edited By 

 thomas c. cha-mberlin and *roli,in d. 



With the Active Collaboration of 



STUART WELLER, Invertebrate Paleontology 

 EDSON S. BASTIN, Economic Geology 



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 

 SIR T. W. EDGEWORTH -DAVID, Australia 

 BAILEY WILLIS, Leland Stanford Junior University 

 CHARLES D. WALCOTT, Smithsonian Institution 

 * Deceased. 



*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, Clark University 

 WILLIAM H. EMMONS, University of Minnesota 

 ARTHUR L. DAY, Carnegie Institution 



AUGUST-SEPTEMBER 1922 



THE HOT WATER SUPPLY OF THE HOT SPRINGS, ARKANSAS - - Kirk BryAn 425 



A DEVONIAN OUTLIER NEAR THE CREST OF THE OZARK UPLIFT 



JosiAH Bridge AND B. E. Charles 450 



THE EARLY PRE-CAMBRIAN FORMATIONS OF NORTHERN ONTARIO AND 



NORTHERN MANITOBA ---------- E.L.Bruce 459 



THE TIME OF GLACIAL LOESS ACCUMULATION IN ITS RELATION TO THE 

 CLIMATIC IMPLICATIONS OF THE GREAT LOESS DEPOSITS: DID THEY 



CHIEFLY ACCUMULATE DURING GLACIAL RETREAT ? Stephen Sargent Visher 472 



MEMORIAL EDITORIAL— ROLLIN D. SALISBURY - - - - - - T. C. C. 480 



PETROLOGICAL ABSTRACTS AND REVIEWS --------- 482 



REVIEWS - - - - - - - - - - - - - - - - - SOI 



THE UNIVERSITY OF CHICAGO PRESS 



CHICAGO, ILLINOIS, U. S. A. 



THE CAMBRIDGE UNIVERSITY PRESS, London 



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



THE MISSION BOOK COMPANY, Shanghai 



