VOLUME XX NUMBER 8 
THE 
JOURNAL or GEOLOGY 
A SEMI-QUARTERLY 
EDITED BY 
. THOMAS C. CHAMBERLIN AND ROLLIN D. SALISBURY 
With the Active Collaboration of 
SAMUEL W. WILLISTON ALBERT JOHANNSEN WILLIAM H. EMMONS 
Vertebrate Paleontology. Petrology ; Economic Geology 
STUART WELLER WALLACE W, ATWOOD ROLLIN T. CHAMBERLIN 
Invertebrate Paleontology Physiography Dynamic Geology 
ASSOCIATE EDITORS 
SIR ARCHIBALD GEIKIE, Great Britain GROVE K. GILBERT, Washington, D.C. 
HEINRICH ROSENBUSCH, Germany : CHARLES D. WALCOTT, Smithsonian Institution 
THEODOR N. TSCHERNYSCHEW, Russia HENRY S. WILLIAMS, Cornell University 
CHARLES BARROIS, France ; JOSEPH P.IDDINGS, Washington, D.C. 
ALBRECHT PENCK, Germany JOHN C, BRANNER, Leland Stanford Junior University 
HANS REUSCH, Norway RICHARD A. F. PENROSE, Jr., Philadelphia, Pa. 
GERARD DEGEER, Sweden WILLIAM B. CLARK, Johns Hopkins University 
ORVILLE A. DERBY, Brazil f WILLIAM H. HOBBS, University of Michigan 
T. W. EDGEWORTH DAVID, Australia FRANK D. ADAMS, McGill University 
BAILEY WILLIS, Argentine Republic CHARLES K. LEITH, University of Wisconsin 
NOVEMBER-DECEMBER, 1912 
CONTENTS 
THE BANNOCK OVERTHRUST; A MAJOR FAULT IN SOUTHEASTERN IDAHO AND 
NORTHEASTERN UTAH - - - - R.W. Ricwarps AND G. R. MANSFIELD 681 
GLACIATION IN THE TELLURIDE QUADRANGLE, COLORADO. III 
ALLEN Davin HOLE 710 
ON THE STRATIGRAPHIC POSITION AND AGE OF THE JUDITH RIVER FORMA- 
TION. III - - - - - - - - - - - - A.C. PEALE 738 
USE OF SYMBOLS IN EXPRESSING THE: yD ee CLASSIFICATION OF 
IGNEOUS ROCKS - - - - - - -  WuitmMan Cross 758 
THE PHYSICAL SETTING OF THE CHILEAN BORATE DEPOSITS 
Rortmw T. CHAMBERLIN 763 
WATER-WORN COAL PEBBLES IN CARBONIFEROUS SANDSTONE 
WitiiAm F. Prouty 769 
UES ee eee yen an aN ae es pa os a Sa ee 
LZ LZ LA 
Che Anibersity of Chicago press 
CHICAGO, ILLINOIS 
AGENTS: 
THE CAMBRIDGE UNIVERSITY PRESS, Lonpon anp EDINBURGH 
WILLIAM WESLEY & SON, Lonpon 
TH. STAUFFER, LErrzic 
THE MARUZEN-KABUSHIKI-KAISHA, Toxyo, Osaxa, Kyoto 
