52 



GEOLOGICAL SURVEY OF THE TEERITOEIES. 



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

 been dissolved into clay of varied colors by tlie 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, ahd stated that a person 



might stand upon the siliceous 

 ,.„«_-,-^^.^,^.,^ mound, extend the tishing-rod 

 g^|5^',. -:.-;x> 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. Wit- 



P'^^^ lj^"i Blackmore, repeatedly per- 



^ fflv^r^ ^j^S: formed this experiment on the 



""irwiS^^^^ southwest shore of the Yellow- 



p^^^^T stone Lake. Fig. 12 will illus- 



_ trate the proximity of one of 



^S=^ ^ 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 

 are withouf any outlet, simply 

 reservoirs for the drainage of 



VflT SPRING, SOUTHWEST OF' YELLOWSTONE LAKE- 



the high 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. 



