94 



GEOLOGICAL SURVEY OF THE TERRITORIES. 



mud at tbe bottom. A channel has been formed 8 feet deep tbrough 

 the fine clay, which carries the surplus water from the crater to the river. 



This is a true intermittent spring. July 28 and 29 it played several 

 times, throwing the water to the height of 20 to 30 feet. (Fig. 30.) The 



