AQUEOUS AGENCIES. 



75 



Sweet and the Eed Sweet Springs, West Virginia, and in 

 the course of the issuing stream, a buff-colored travertine 

 is deposited. About two miles below the Red Sweet the 

 stream makes the Beaver-dam Falls. Here everything 

 within reach of the spray leaves, twigs, grass becomes 

 quickly coated with deposit. In California, the exqui- 

 sitely banded Suisun marble is a deposit formed in earlier 

 geological times. In Yellowstone Park, the deposits of 

 this kind are very abundant, and assume strange and 

 beautiful forms (Fig. 41). 





FIG. 41.-Deposits of lime carbonate, Yellowstone Park. (After Hayden.) 



Deposits of Iron Oxide. Iron is one of the most 

 universally diffused of substances. In the form of car- 

 bonate and sulphate, especially the former, it is dis- 

 solved in the water of chalybeate springs. Every one 

 must have observed that about such springs there is a 



