VOLUME XIX 



NUMBER 2 



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. E. 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 



R. A. F. PENROSE, 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 



FEBRUARY-MARCH, 191 1 



CONTENTS 



THE SOUTHERLY EXTENSION OF THE ONONDAGA SEA IN THE ALLEGHENY 



REGION ---------------------- E. M. Kindle 97 



THE MISSISSIPPIAN-PENNSYLVANIAN UNCONFORMITY AND THE SHARON CON- 

 GLOMERATE ------ ^ ------------- _ g. F. Lamb 104 



THE WICHITA FORMATION OF NORTHERN TEXAS 



C. H. Gordon, George H. Girty, and Davld White iio 



NOTES ON THE OSTEOLOGY OF THE SKULL OF PARIOTICHUS E. B. Branson 135 



HIGH TERRACES AND ABANDONED VALLEYS IN WESTERN PENNSYLVANIA 



Eugene Wesley Shaw 140 



REQUISITE ^CONDITIONS FOR THE FORMATION OF ICE RAMPARTS 



William H. Hobbs 157 



THE TERMINAL MORAINE OF THE PUGET SOUND GLACIER J. Harden Bretz 161 



EDITORIAL: 



The Seeding op Worlds ------------------- T. C. C. 175 



Artesian Waters oe Argentina ----------------- B. W. 178 



PETROGRAPHICAL ABSTRACTS AND REVIEWS -------------- 18 1 



REVIEWS ------- -7- ------------- l8g 



C^e Ontfcetgit? of Chicago ptz$$ 



CHICAGO," ILLINOIS 



Agents : 



CAMBRIDGE UNIVERSITY PRESS, London and Edinburgh 



WILLIAM WESLEY & SON, London 



TH. STAUFFER, Leipzig 



