

OF THE PAPAL STATES. 



271 



218. 



Stalagmite {commonly 



u travertine of 



Tivoli"), and found in hollows of large masses at the 

 limestone cavern, near Lake Tartarus. 



219. — Calcareous tufa or travertine, a stalactitic 



carbonate of lime. — From the cascade near Torni.* 



220. — Tufa, a calcareous deposit investing stems of 

 plants. — From below the bastion of Paul V., on the Aven- 

 tine Mount, inside Rome. 



Uppeb 

 Gauubby* 



Table-case 

 in Recess 6. 



221. 



>f 



Forms the Pincian Hill, both inside and outside Rome, 

 underlying volcanic tufa. 



222 _ . 

 Monte Pincio. 

 223. 



of a leaf. 



>f 



•Below the bastion of Paul V., on Mount Aventine, inside 



Rome. 



224. — Conglomerate (pudding stone), calcareous and 

 siliceous pebbles in a hard calcareo-arenaceous base. 

 From the bridge of St. Onofrio, near Monte Mario. 



225. — Conglomerate. — Forming Monte Sacro, and over- 

 lying the elephant gravel, near Ponte Salaro, 3 miles from 

 Rome. 



226. 



augiticf) 



brecciated tufa. — From the deposit below the bridge beyond 

 Sta. Agnese, 3 miles from Rome. 



227. — Conglomerate, composed of calcareous and sili- 

 ceous pebbles in a silicio-calcareous base. — Forms a portion 

 of Monte Mario, near Rome. 



228. — Compact calcareous conglomerate. — From the 

 Vatican Hill, outside Rome. 



" The calcareous waters of the Anio incrust the reeds which 

 grow on 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."— LyeWs Principles of Geology, p. 241. 





