CONTENTS 



Pages 



Significance of the Sherburne Sandstone in Upper Devonic Stra- 

 tigraphy. By Amadeus W. Grabau 423-470 



Permo-Triassic of Northwestern Arizona. By Hervey W. 



Shimer _.---. 471-498 



Evolution of Geologic Climates. By F. H. Knowlton - - - - 499-566 



Coal Measures of Maryland. By Charles K. Swartz, W. Arm- 

 strong Price, and Harvey Bassler 567-596 



Post-Glacial Uplift of Southern New England. By Herman L. 



Fairchild - - 597-636 



Index to Volume 30 637-644 



Title-page, Contents, etcetera, of Volume 30 ------ i— xiii 



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