CONTENTS OF VOLUME XXXI 



NUMBER I 



PAGE 



The Cycle oe Erosion and the Summit Level of the Alps. W. M. 



Davis I 



Some New Featxires in the Physiography and Geology of Green- 

 land. Lauge Koch 42 



The Lava Field of the Parana Basin, South America. Charles 



Lawrence Baker 66 



Petrological Abstracts and Reviews 80 



Reviews 86 



NUMBER II 



The Problem of the Anorthosites and Other Monomineral 



Igneous Rocks. F. Loewinson-Lessing 89 



The Growth of Stalagmites and Stalactites. Vernon C. Allison 106 

 The Physiographic Development of the Big Thompson River 



Valley IN Colorado. Margaret Bradley Fuller . . . . 126 

 Notes on Mud Crack and Ripple Mark in Recent Calcareous 



Sediments. E. M. Kindle 138 



Algae, Believed to be Archean. John W. Gruner .... 146 

 An Association of Kaolinite with Miarolitic Structure. A. F. 



Buddington 149 



Editorial 154 



Reviews 154 



NUMBER III 



The Final Consolidation Phenomena in the Crystallization of 



Igneous Rock. R. J. Colony 169 



A Venerable Climatic Fallacy. T. C. Chamberlin .... 179 



