CONTENTS TO VOLUME XXII vii 



PAGE 



DiASTROPHISM AND THE FORMATIVE PROCESSES. VIII. ThE QUAN- 

 TITATIVE Element in Circum-continental Growth. T. C. 



Chamberlin . 516 



Petrological Abstracts and Reviews 529 



Recent Publications . 534 



NUMBER VI 



The Strength or the Earth's Crust. V. The Depth oe Masses 

 Producing Gravity Anomalies and Deflection Residuals 

 {Continued). Joseph Barrell 537 



Notes on the Geology of the Sun River District, Montana. 



Sidney Powers and Hervey W. Shimer 556 



Correlation and Structure oe the Pre-Cambrian Formations of 



the Gwinn Iron-bearing District of Michigan. R. C. Allen 560 



Evidence of the Middle-Upper Huronian Unconformity in the 

 Quartzite Hills at Little Lake, Michigan. R. C. Allen and 

 L. P. Barrett 574 



Physiographic Relations of Serpentine, with Special Reference 

 to the Serpentine Stock of Staten Island, N.Y. W. O. 

 Crosby 582 



The Mode of Formation of Certain Gneisses in the Highlands 



OF New Jersey. I. Clarence N. Fenner 594 



The MississiPPiAN Rocks of Northeastern Oklahoma. L. C. Snider 613 



Petrological Abstracts and Reviews 625 



Reviews 630 



NUMBER VII 



A Summary of the Orogenic Epochs in the Geologic History of 



North America. Eliot Blackwelder 633 



The Strength of the Earth's Crust. VI. Relations of Iso- 

 static Movements to a Sphere of Weakness — the Astheno- 

 sphere. Joseph Barrell 655 



A Comparison of the Cceur d'Alene Monzonite with Other Plu- 

 tonic Rocks of Idaho. C. A. Stewart 684 



A Graphic Method of Representing the Chemical Relations of 



A Petrographic Province. Frank D. Adams .... 689 



The Mode of Formation of Certain Gneisses in the Highlands 



OF New Jersey {Concluded). Clarence N. Fenner . . . ■ 694 



