106 F. V. Hayden—Hot Springs and Geysers 
miles long, and on an average four miles wide. Between thef 
and second cajions there is a basin about 20 miles long, and 
an average four miles in width, with the modern Pliocene mar 
and sands covered by a floor of basalt in some places. The 
was a continuous chain of these lakes, of greater or less size, 0 
and second was fast decomposing, and the springs were 
extinct. One only Ate a “ip of 140°. 
ascending the hill among the pines, about three-fourths of # 
mil m the river bottom, we came suddenly upon one of 
most remarkable exhibitions of the hot spring deposits 
we have seen in this land of wonders. In the distance 
looks like a vast glacier of snow and ice, and on that ac 
we have named it the White Mountain. Indeed the different 
terraces can be compared for their wonderful beauty only . 
