* 



406 



TKAVERTIN IN TIVOLI. 



[Ch. XVII. 



its banks, and the foam of the cataract of Tivoli forms 

 beautiful pendant stalactites. On the sides of the deep 

 chasm into which the cascade throws itself, there is seen an 

 extraordinary accumulation of horizontal beds of tufa and 

 travertin, from four to five hundred feet in thickness. The 

 section immediately under the temples of Vesta and the 



m 



feet 



each concentric layer being about the eighth of an inch i 

 thickness. The following diagram exhibits about fourtee 



Fig. 29. 



o o <' o 

 coo 



Section of spheroidal concretionary Travertin under the Cascade of Tivoli. 



feet of this immense mass, as seen in the path cut out 01 tn 

 rock in descending from the temple of Yesta to the GrotiO 









^ 















ing 



the: 



vari 



tioB 



. CUIM 



trav 

 g lot 

 mas 

 beii 



plac 

 tufa 

 aao' 

 abo 1 

 fill* 

 tufa 

 T 



Tvas 

 oft 

 tuff 



con 



and 



the 



cart 



roc] 

 Ten 

 circ 

 ^vhi 



pos 



P08 



b 



a 



ee 



as 

 in 



i 



) 



