49 



or less jointed, and therefore easily eroded by underground waters. 

 As a result, large caves, some of them possessing great vaulted rooms, 



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lower C at tonUf'oui 

 Time. 



deep pits, high waterfalls and streams of water large enough to allow 

 the ready passage of a boat, are found throughout this area. All of 

 these caves are due to the action of water— that greatest of nature's 

 4— A. OF Science, '03. 



