Studies for Students 



RELATIONS BETWEEN CLIMATE AND TERRESTRIAL 



DEPOSITS^ 



JOSEPH BARRELL 



Yale University, New Haven, Conn. 



General Introduction. 



Part I.^ Relations of Sediments to Regions of Erosion. 

 Introduction. 

 Character of rocks supplying sediment. 



Similar effects from lithologic and climatic causes. 

 Elimination of lithologic factors. 

 Relations of rainfall and topography to erosion. 



Interrelations of topographic and climatic causes. 

 Young topography and various climates. 

 Mature topography and various climates. 

 Old topography and various climates. 

 Relations of temperature and topography to erosion. 



Effects of temperature variations on vegetation and soil retention. 

 Effects of increased cold. 



On frost action and erosion. 

 The Gila conglomerate of Arizona as an example. 

 On snovi'fall and erosion 

 Effects of increased heat. 



Effects on rock disintegration. 

 Effects on rock decay. 

 Separation of the topographic and climatic factors. 

 Separation of tectonic and climatic oscillations. 

 Conclusions on Relations of Climate and Erosion. 



GENERAL INTRODUCTION 



The environment of the lands may be classified into three funda- 

 mental and independent factors — the relations to the surrounding 

 seas, the topography which forms their surfaces, and the climates 



1 Presented in abstract before the Geological Society of America, December 26, 

 1906. The term terrestrial deposits has special reference here to fluvial and pluvial 

 deposits rather than glacial, lacustrine, and eolion deposits. 



2 Parts II and III will be published in later numbers. 



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