268 



EEPOET UNITED STATES GEOLOGICAL SURVEY. 



TaMe of the Minute Man Group — Continued. 



ISfame. 



27 



Black 

 Salphar. 



Twins 



Size of spring 



1, 2 by 2 feet, 3 in- 

 ches deep. 



2, 3 by 4 feet ; 1 

 foot deep. 



3, 3 by 6 feet; 4 

 feet deep. 



Cones 3 feet deep . 



3 by 4 feet .. 

 5^ by 7 feet. 



Fissnre 11 by 2 2 

 feet. 



13 by 17 feet; 

 sprin s, 1 foot 

 deep basin, 4 in- 

 ches deep. 



5 by 14 feet; 6 feet 

 aeep. 



23 by 25 feet 



7 feet diameter . . . 

 18 by 13 by 12 feet. 



Fissnre, 1 by 2^ 

 feet. 



17byllfeet 



7 by 6J feet , 



« g 



172J 



180 

 186 



163 

 121 



124 



146 



1.54 

 156 

 161 

 154 

 158 

 140 

 115 

 133 

 123 

 110 



.1.55 

 136 

 130 

 145 

 150 

 130 

 128 



Deep temper- 

 atures. 



3 feet belo-sv 

 surface, ItfGA. 



4i feet below 

 the surface, 146. 



57 



57 



57 



72 



11. 45 a. m 



9. 20 a. m. 



9 40 a. m. 



15 a. m. 



Remarks. 



Three vents, all boiling. 



Cones are about 6 inches 

 hi^h, and water out of 

 si.sht. 



Small pool surrounded 

 with gey serite. 



Bed pool with tliree white 

 lined orifices in the 

 basin. 



There is a spring on the 

 mound above the fis- 

 sure The fissnre has a 

 yellow basin. 



Dry steam holes. 



This spring has a flat 

 brown basin. The 

 spring is quiet, with a 

 slight escape of bub- 

 bles at intervals from 

 the center. 



The spring is lined with 

 dark green and red con- 

 feryoidea, and is cavern- 

 like at one end. 



A collection of mudboles 

 and steam ventsin which 

 there is generally light- 

 colored mud. 



Dead pool on edge of 

 river. 



Seven springs concealed 

 in the grass, some near- 

 ly extinct ; most of them 

 are mudholes. 



Has a yellow lined basin 

 on a mound of geyser- 

 iie. 



Greeni.sh-red basin, with 

 white lined funnel in 

 center. Pearl-gray bor 

 der with irregular sur 

 face on the bottom. 



Dark red pool with grassy 

 edge. 



A small oozing hole near 

 Nos. 19 and 20. 



THE LITTLE GIANT GROUP. 



The Little Giant Group is really a continuation of the Minute Man 

 Group, although the drainage from the springs so included is connected 

 with that from the Little Giant Geyser, on which account I have con- 

 sidered them as a separate group. Nos. 15 to 22 are disconnected, 

 forming a sub-group, which appear to drain in the opposite direction 

 from those around the Little Giant. AA^lien we saw them they were 

 mainly sulphur oozes in a large flat, although in wet seasons there are 



