PEALE.] 



UPPER GEYSER BASIN OF FIRE HOLE RIVER, 



247 



proportion of the overflow, is underlaid witli the mOvSt delicate salmon- 

 colored silica. There is also a great amount of the soft gelatinous mat- 

 ter, which is probably the new varietj^ {viandite) described in another 

 portion of the report. 



IRON-SPRINa GROUP. 



Under this name I have included a number of springs on the west side 

 of Iron-Spring Creek, mostly some distance above the level of the val- 

 ley at the foot of the bluft's. Some of them are from 125 to 150 feet 

 above the level of the creek. These springs have never been carefully 

 examined, as they are small and comparatively unimportant. They are 

 characterized by a deposit of ferric oxide. 



With these may be included a grouj) of springs on the Little Fire 

 Hole River, about a half mile above its mouth in the cafiou. They are 

 just beyond thelimitsof themap, and are referred to by Professor Bradley 

 (report for 1872, p. 241) as '• small hot springs." I have mentioned these 

 springs in order to make the reference to the springs as complete as pos- 

 sible. 



RECAPITULATION OF UPPER GEYSER EASIN. 



The following is a recapitulation of the springs and geysers of the 

 Upper Geyser Basin: 



!Name. 



if umber of 

 springs. 



Highest tem- 

 perature. 



Soda Geyser Group ... 



Eiver Group 



Cascade Group 



Grotto Group 



Giant Group 



Kound Spring Group. . 

 White Pyramid Group 



Ca.stle Group 



Grand Group 



Old Faithful Group... 



Upper Springs 



Giantess Group 



Three Crater Group . . 



Emerald Group 



Iron Spring Group 



Total 



°r. 



194 

 190 

 192 

 198 

 ]97 

 196 

 200 

 198 

 199 

 200 



199 

 199 

 198 



This gives not only those that are catalogued in the preceding pages, 

 but all that are shown on the map, except in the case of the Three 

 Crater Group, all of which are uot given even on the map. All of the 

 springs referred to are not given above, as some are beyond the limits 

 of the map. 



The following table gives a list of all the principal geysers in the 

 Upper Basin, and their periods, heights, and durations as far as known : 



Geysers of the Upper Geyser Basin. 



Kame of geyser. 



Group in which sit- 

 uated. 



Interval or period. 



Duration of erup- 

 tion. 



Height of col- 

 umn. 



Soda 



Soda Geyser Group 

 Iliver Group 







Feet. 



Kcstless 









Sentinei 









''O 



Grotto 



Grotto Group 



....do 



Several timea a day. 

 



U;.'<lfhnurto2i hours 

 9 to 30 (?) miilutes -. 





Fan 



About GO 



