156 



GEOLOGICAL SURVEY OF THE TERRITORIES. 



Fame. 



Old Faithful 

 Bee-Hive . . . 



Giantess 



Castle 



Grand 



Turban 



Grotto 



c 

 no 



, * 



o 



17 

 3 

 1 

 3 

 3 

 1 



Average 

 length of 

 eruptions. 



Average in- 

 terval be- 

 tween erup- 

 tions. 



ft. in. g. 



1 2 45 



23 17 30 



24 10 30 



'3 



.a 



a 

 s 



Feet 

 130 



39 

 93 

 173 

 25 

 41 



o > 



c% 



c s__. 



rt S £ 



^ C o 



7,397 



7, 402 

 7,403 

 7,387 

 7, 387 

 7,387 

 7, 324 



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

 •we pass throngb the timber at tlie foot of a hill. Emerging from the 



trees the tirst spring 

 we meet with is situ- 

 ated at the top of the 

 hill some distance 

 above the level of the 

 river. This spring is 

 b o r d e r e d b y ca nli- 

 tlower-like forms of 

 geyserite, which have 

 a greenisli ti 

 water flows 

 spring in several small 

 streams, the bed of 

 each one bein g a bright 

 orange color. The 



a a, Orifices of cones ; h b, Outlets for water. WatCr flowing down the 



hill becomes cool long before it reaches the river. An analysis of a 

 specimen from the edge of this spring is as follows : 



Color, greenish-gray ; fracture, couclioiaal ; ln.ster, dull ; hardness outside 3, inside 6. 



Analysis. 



1^^-. The 

 from the 



PLAN OF GROTTO GEYSER. 



h b, Outlets for water. 



Per cent. 



LossatllOoC 'fW 



Loss on Ignition •- . T n 



Silica. o'j-l" 



Alumina 



Iron 



1.96 



;;;;;;;;;""""" n? 



Lime r^ * '^^ 



Magnesia i^^'^'^^' 



Soda Ti'ice. 



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-llole and Madison Kivers : 



