INEQUALITIES OF SEDIMENTATION^ 



E. M. KINDLE 

 Geological Survey of Canada, Ottawa 



CONTENTS 



Introduction 

 Clastic Deposits 



Observations on the Great Lakes 



Littoral marine deposits 



Current work in deep water 



Shifting of deposits 



Relative aridity 



Role of vegetation in estuaries ' 



Periodic and cataclysmic variations 

 Organic and Biochemical Deposits 



Limestones of biochemical origin 



Coral reefs 



Lithiiication 



Variability of Molluscan contribution 



Bone beds 



Displacement of ocean currents 



Barren areas 



Seasonal variation ^ 



Conclusions 



INTRODUCTION 



Most of the earlier discussions touching the subject of sedi- 

 mentation leave in the mind of the reader the impression that 

 water-laid sediments other than delta deposits accumulate over 

 very wide areas at a nearly uniform rate. Leaving out of considera- 

 tion delta and estuarine sediments whose relatively rapid accumu- 

 lation is of course universally recognized, variability or contrast 

 in rates of deposit between different areas and between different 

 periods in the same area rather than uniformity appears to the 

 writer to be the dominant feature characterizing sedimentation. 

 In both its time and space relations sedimentation is highly 

 variable. 



' Published with the permission of the director of the Geological Survey of Canada. 



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