[volume XXVIII " NUMBER 5 



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. Petrology 



ROLLIN T. CHAMBERLIN, Dynamic Geology 



ASSOCIATE EDITORS 



SIR ARCHIBALD GEIKIE, Great Britain JOHN C. BRANNER, Leland Stanford Junior University 



CHARLES BARROIS, France RICHARD A. F. PENROSE, Jr., Philadelphia, Pa. 



ALBRECHT PENCK, Germany WILLIAM H. HOBBS. University of Michigan 



HANS REUSCH, Norway FRANK D. ADAMS, McGill University 



GERARD DeGEER, Sweden CHARLES K. LEITH. University of Wisconsin 



T. W. EDGEWORTH DAVID. Australia „,.tt . ^t. ,.r «-T^«.r.UT^ tt j tt • •. 



B.TTT7ir «rTTTTc T 1 J c^ t J T • TT ' % WALLACE W. ATWOOD, HaFvard University 

 BAILEY WILLIS, Leland Stanford Junior University 



CHARLES D. WALCOTT, Smithsonian Institution WILLIAM H. EMMONS, University of Minnesota 



JOSEPH P. IDDINGS, Washington, D.C. ARTHUR L. DAY, Carnegie Institution 



JULY-AUGUST 1920 



RECENT STUDIES OF THE UPPER CRETACEOUS OF TENNESSEE - Bruce Wade 377 



THE CHESTER SERIES IN ILLINOIS. II Stuakt Weller 395 



CONCERNING THE PROCESS OF THRUST FAULTING - - - Terence T. Quirke 417 



PLEISTOCENE MOLLUSCA FROM INDIANA AND OHIO - Frank Collins Baker 439 



FACTORS PRODUCING COLUMNAR STRUCTURE IN LAVAS AND ITS OCCUR- 

 RENCE NEAR MELBOURNE, AUSTRALIA ----- Albert V. G. James 458 



REVIEWS - 470 



RECENT PUBLICATIONS - 47 1 



THE UNIVERSITY OF CHICAGO PRESS 



CHICAGO, ILLINOIS, U.S.A. 



THE CAMBRIDGE UNIVERSITY PRESS, London 



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



THE MISSION BOOK COMPANY, Shanghai 



