GROUND-WATER 



217 



several geysers have ceased to erupt and new ones have been de- 

 veloped. In the Yellowstone Park, where there are said to be some- 

 thing like "3,000 vents of all sorts, hot springs which are not eruptive 



Fig. 176. Deposit from a hot spring in Yellowstone Lake. (Fairbanks.) 



Fig. 177. Hot springs deposits, Mammoth Hot Springs, Yellowstone Park. 



