160 



REPORT UNITED STATES GEOLOGICAL SURVEY. 



eluded in tlie same group. The stream from this ravine, instead at 

 flowing past the White Dome to join the stream from the Fissure Group, 

 as was formerly supposed and shown on all previous maps, turns to the 

 westward in the neighborhood of the Great Fountain, and disappears 

 in the timber, to reappear on the banks of the Fire Hole, opposite the 

 marshy lakes, with a diminished supply of water, most of it having been 

 lost in marshes in the passage through the woods. This has been 

 one of the reasons why the stream has not been recognized before. Mr. 

 Mushbach followed and discovered this fact this year, although it had 

 been suspected by Mr. Holmes. In this group we have the largest and 

 most active geyser in the Lower Geyser Basin, beside the only true 

 geyser cone or mound of any height that at all resembles those of the 

 Upper Basin. 



The springs extend up the ravine in small groups, somewhat isolated, 

 to a distance of about 1,500 feet above the Great Fountain. There are 

 two falls of 7 feet and 10 feet, respectively, on the stream. Below the 

 White Dome, on the plain, there are a number of trees that have been 

 killed by the action of the hot water, and their bases are coated with a 

 white deposit of silica, which has been carried up from the base of the 

 tree in the water by capillary action and left by the evaporation of the 

 water, and not, as Professor Comstock supposes, by deeper floods of sili- 

 ceous water. 



According to my usual plan, I now give the springs of the group. The 

 temperatures of about 62 springs were taken, although there are per- 

 haps more than that number of springs, all not being enumerated : 





Table of Fifth 



!>r White Dome 



CrTOUp. 



Name and ntunber. 



Size of spring. 



tl P. 



3 



k 



a 



o 

 o 



Remarks. 



*1 a 





o -p. 

 166 



172 



175 



152 



199J 



175 



199 



160 



163 



030 



^128 



-a 65 



^37 



163 



157 



182 



087 



U28 



196 



185 



180 



150 



196 

 196 



200J 

 201 

 190 

 199 



197 

 Not 

 taken 



10.15 a,.m- 



°F. 

 43 





b 

















d 









- 







" 





Bubbler. 



f 





















£::::::::::::::::: 























k 



|2feet diameter 



i 













s 

















































White spring. 

































t 









Gray fissure. 













20 feet diameter 



Gray spring. 



, There are other openingsnear 



2 ffl . 









J) 



Basin 7 feet diameter. . . 











I 





) of sight. 



< A collection of holes in snr- 

 l face. 



6 









S 





Great rountain Gey- 

 ser. 

 4 





Basin was not quite full 'srheii 



8 by 18 feet 



1.20 p.m.. 



.47 



the temperature was taken. 

 Long, irregular-shaped sprinsj. 



5 



10 by 12 feet 



Tellow-rimmed spouting 











spring, fissure-like, with 

 two outlets. 



■ This group of springs (1 a to t?) is on a broad, flat space below the Whit« Dome Geyser. 



