PEALE.l 



SHOSHONE GEYSER BASIN LAKE GROUP. 



273 



LAKE GROUP. 



Under the designation of Lake Group I bave included a group of 

 sputtering springs and holes that lie mainly on a sand flat at the mouth 

 of the small streams, or courses, that carry the drainage from the Orion 

 Group when there is a surplus of water in wet seasons. It is evident 

 that at times these springs are under water, and at the time we saw 

 them we noticed springs bubbling through the water of the lake, not 

 far from the shore. I have included with them a mud pot that is on 

 higher ground, and also two pools (Nos. 14, 15, 16, and 17) that might have 

 been included with the Orion Group, as they are but little lower than 

 the plateau of the latter. They were visited, however, when the springs 

 on the sand flat were noted. The latter are on the north edge of the 

 swampj'^ meadows that border on the lake south of Point Lookout. It 

 is through this swamp that Shoshone Creek meanders to flow into the 

 lake. There are a number of springs scattered over it, as was evident 

 each morning when the air was cool enough to make the rising steam 

 visible. The lake shore must change from year to year, as we found it 

 very different from what was observed in 1872. 



Taile of the Ldlce Group. 



No. 



Size. 



Depth. 



CO 



4) 



Remarks. 



1 







° F. 



O J\ 

 76' 



Mound surrounded by spitting holes. 



This spring has a basin and an irregu.ar 

 opening, and has a scalloped rim. Sulphur 

 lines the outlet and water-way. The water 

 flows out gentl.y, bubbles of sulphuretted 

 hydrogen gas escape gentiy. 



There are two openings in one spring ; a is 

 red-lined, b is gray -lined with 12 bubbling 

 holes. 



Small sulphur cone. 



2 



5 by 6J feet 



a, 3Jfeot.... 

 6, 4Jfeet 



154 



s 



0, 3 by 2 feet 





105 

 108 







6, 3 feet diameter . 





4 





5 



a, 30 by 36 inches . 

 6, 35 by 17 inches . 

 32 by is inches 





Not taken. 

 142 

 159 

 124 

 124 

 b5 

 125 

 130 

 Too low for 

 tempera- 

 ture. 



181 



177 



Not taken . . 



■ 192 



195 



130 

 Not taken . . . 



155 



Cold 



--■ 









6 





This is a quiet pool. 



These springs form a group in which there 

 are numerous sputtering holes. 



7 



a, 2tj by 56 inches . 

 6, 12 by 12 feet.... 











c, 5 by 5 feet 







d, 12 by 14 inches . 



e, 14 by 17 inches . 













8 





Four or five sulphur-lined vents. 



Small bulging spring lined with grey geyser- 

 ite. 



9 



10 



12 by 13 inches.... 

 36 by 40 inches 



Ifoot 



11 



a, 1 inch diameter 

 h, 6 by 9 inches .. 





Three small sulphur-lined mounds. In b and 

 c the water rises and falls ;ind spouts a few 









c, 5 by 12 inches... 





1?, 



5 by 7 incliea 





This spring has a mound 3 feet in diameter. 



13 



H^ by 9i feet 





14 



15 



[l27 by 786 feet... 





Small sulphur ooze near No. 13. 



Large pool divided by constrictions into 



IC 

 17 



20 by 22 by 25 feet. 



465 feet 



119 





three. 



Large pool with red leathery lining, no out- 

 lot, slight bubbling in the center. 



18 H, PT II 



