The Fournal of Geology 
Vol. XXI CONTENTS FOR JULY-AUGUST 1913 No. 5 
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THE SIGNIFICANCE OF RECENT DEVELOPMENTS IN THE PRE-CAMBRIAN STRATIGRAPHY OF THE 
LAKE SUPERIOR-LAKE HURON REGION - - - - - - - - -  Mortey E) Wirson 385 
THE ORDER OF CRYSTALLIZATION IN IGNEOUS ROCKS - - - - - - -  N.L. Bowen 399 
PSEUDOBRECCIATION IN ORDOVICIAN LIMESTONES IN MANITOBA - - - - R.C. Warrace qo2 — 
VARIATIONS OF GLACIERS. XVII. - - --.- + 4- -.-. -. “|<.” SHakey Femme Remo 
THE EXTENT OF THE CORDILLERAN ICE-SHEET - - - - - - =  ~- CHarLEs A. STEWART 427 
AN EXPOSURE SHOWING POST-KANSAN GLACIATION NEAR IOWA CITY, IOWA Morris M. LeicHTon 431 
RECONNAISSANCE IN THE SOUTHERN WASATCH MOUNTAINS, UTAH - - - - G.F. Lovcsumn 436 
NEW SPECIES FROM THE SANTA LUCIA MOUNTAINS, CALIFORNIA, WITH A DISCUSSION OF THE 
JURASSIC AGE OF THE SLATES AT SLATE’S SPRINGS - - - - - -  Cuartes H. Davis 453 - 
GLACIAL POT-HOLES AT CROWN POINT, NEW YORK - - - - - - -  E, EvGENE BARKER 459 
REVIEWS: (72) SRP hi Sal sae eee er RIG Aico peat Wi ceri eg a Oe ee 
RECENT, PUBLICATIONS). = 02002 0° eb ey ee a 
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