TERTIARY HISTORY OF THE TENNESSEE RIVER 231 



altitude of these gravels noted in the Sequatchie valley strongly 

 negatives the possibility of the proposed capture. The absence of 

 the gravels from the peneplain southward from Chattanooga and 

 the presence of nothing more than occasional scattered pebbles whose 

 distribution indicates their Cretaceous age, completes the evidence 

 that the Tennessee River has persisted in its present course through 

 Walden Ridge for a long period of time, probably since the close of 

 the Cretaceous period at least. 



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