156 



GEOLOGICAL SURVEY OF THE TERRITORIES. 



Name. 



1^ 



o 



Average 

 length of 

 eruptions. 



Average in- 

 terval be- 

 tween erup- 

 tions. 



'3 



g 



a 



1 



e > 

 «| 



s (c £ 



Old Faithful 



17 

 . 3 

 1 

 3 

 3 

 1 

 2 



m. s. 



4 53. 07 



8 10 



7 13 



15 30 



28 00 



15 CO 



125 30 



h. m. s. 



1 2 45 



23 17 30 



Feet 

 130 



39 



93 



173 



25 



41 



Feet. 

 7,397 

 7,402 

 7 408 



Bee-Hive 



Giantess 



Castle 





7 387 



Grand 



24 10 30 





Turban 



7,387 



Grotto 





7 324 









As we go from the Grotto Geyser down the river on the oppsite side, 

 we pass through the timber at the foot of a hill. Emerging from the 



trees the first spring 

 we meet with is situ- 

 ated at the top of the 

 hill some distance 

 above the level of the 

 river. This spring is 

 bordered by cauli- 

 flower-like forms of 

 geyserite, which have 

 a greenish tinge.' The 

 water flows from the 

 spring in several small 

 streams, the bed 'of 

 each one being a bright 

 orange color. The 

 water flowing down the 

 An analysis of a 



PLAN OF GKOTTO GEYSER. 



a a, Orifices of cones ; b 6, Outlets for water. 



hill becomes cool long before it reaches the river, 

 specimen from the edge of this spring is as follows : 



Color, greeuish-gray ; fracture, conchoidal ; luster, dull ; hardness outside 3, inside 6. 



Analysis. 



Per cent. 



Loss at 110° C 2.00 



Loss on ignition ^ 10. 20 



Silica 86.10 



Alumina 1.96 



Iron 717 



Lime 28 



Magnesia Tro ce. 



Soda Trace. 



Potassa. Trace. 



Lithia Trace. 



101. 2.57 



Thinking that the hot springs would have considerable influence on 

 the temperature of the water in the river, I took the following tempera- 

 tures in the Fire-Hole and Madison Rivers : 



