52 



GEOLOGICAL SUKVEY OF THE TEKRITOEIES. 



of a vast mass whicli extended all along the river, but which has now 



been dissolved into clay of varied colors by the hot springs. The joints 



are very regular. 



In my report of 1871, page 100, I described the Hot Spring mounds 



that extended into the lake from the shore, and stated that a person 



might stand upon the siliceous 

 mound, extend the fishing-rod 

 out into the waters of the lake 

 and catch trout weighing from 

 one to two pounds and cook 

 them in the boiling springs 

 without removing the fish from 



^ the hook. My friend, Mr. Wil- 



^^p^^ liam Blackmore, repeatedly per- 

 formed this experiment on the 

 southwest shore of the Yellow- 

 stone Lake. Fig. 12 will illus- 

 trate the proximity of one of 

 these boiling springs to the cold 

 waters of the lake. 



Upon the high divides on either 

 side of the Yellowstone are nu- 

 merous little lakes, at an eleva- 

 tion of 10,000 to 11,000 feet 

 above the sea. Oftentimes they 

 ctre without any outlet, simply 

 reservoirs for the drainage of 



HOT SPRING, SOUTHWEST OF' YELLOWSTpNE LAKE. 



the higli plateau. Fig. 13 represents one of these elevated bodies 

 of water which will always be invested with a charming interest 

 on account of their romantic picturesqueness. Fig. 13 shows our camp 

 at night after the party had made a long, tedious march from the Yel- 

 lowstone Lake on the way to the source of the East Fork. Fig. 14 

 represents the party on horseback as it left the camp the following 

 morning. The cuts were engraved from photographs taken by Mr. 

 Jackson. The photographs show the whole party reflected in a remark- 

 able manner in the clear waters of the lake. 



