CONTENTS OF VOLUME XII "vii 



NUMBER V 



PACE 



Description and Correlation of the Romney Formation of Mary- 

 land. Charles S. Prosser - - - - - - - - 361 



Granites of North Carolina. Thomas L. Watson - - - - 373 



Geological Notes on the Vicinity of Banff, Alberta. I. H. Ogilvie 408 

 Glacial and Post-Glacial History of the Hudson and Champlain 



Valleys. Charles Emerson Peet - - - - - - - 415 



Reviews: The Non-Metallic Minerals, G. P. Merrill (G. F. K.). 470; 

 Geology of Miller County, Sydney H. Ball and A. F. Smith (H. L.), 

 470 



NUMBER VI 



Physiographic Studies in Southern Pennsylvania. George W. Stose 473 

 iJBER DIE Gegenseitigen Beziehungen Zwischen der Petrographie 



und Angrenzenden Wissenschaften. Ferdinand Zirkel - - 485 

 An Occurrence of Greenstone Schists in the San Juan Mountains, 



Colorado. Ernest Howe - - - - - - - - 501 



An Occurrence of Trachyte on the Island of Hawaii. Whitman 



Cross ------------ ^lo 



Physiographic Problems of Today. Israel C. Russell - - - 524 

 Widespread Occurrence of Fayalite in Certain Igneous Rocks of 



Central Wisconsin. Samuel Weidman - - - - -551 

 Reviews: The Clays and Clay Industry of New Jersey, Heinrich Ries 



and Henry B. Kiimmel, assisted by George N. Knapp (J. H. L.), 562; 



Oil and Gas. Levels, I. C. White (R. D. S.), 563; Baraboo Iron- 

 Bearing District, Samuel Weidman (R. D. S.), 564. 

 Recent Publications . . . ^gg 



NUMBER VII 



The Profile of Maturity in Alpine Glacial Erosion. Willard D. 



Johnson ----------- ^gg 



Systematic Asymmetry of Crest Lines in the High Sierra of Cali- 

 fornia. G. K. Gilbert - - - - - - - - - 579 



The Problems of Geology. Charles R. Van Hise - - - - 589 



Glacial and Post-Glacial History of the Hudson and Champlain 



Valleys, II. Charles Emerson Peet - - - - - - 617 



Reviews: The Economic Resources of the Northern Black Hills, J. D. 

 Irving (W. D. S.), 661 ; Zinc and Lead Deposits of Northern Arkansas, 

 George I. Adams, assisted by A. H. Purdue and E. F. Burchard (W. 

 D. S.), 663. 



Recent Publications - - - 665 



