74 



EEPORT UNITED STATES GEOLOGICAL SURVEY. 



MAMMOTH HOT SVniKGS— Continued. 



Number and name. 



40. 

 41. 

 42. 



43- 



44. 

 45. 



46 



47. Glen Grotto. 



48 



48 a. Cave Spring 



48 b. Small springs in 



grass. 

 49 



Size. 



OF. 



Small mound -with 2 a 121 



openings. 6 120 



Three smgll cones aliont ja 125 



an inch each in height. ,6 112 



120 



150 feet long 



20 feet diameter 



I These are on a long 

 mound of deposit, 

 pel haps 200 feet loug, 

 10 feet high. 



Small holes 



a 4 feet diameter... 

 Small oozing holes - 



a 2 by 2 feet , 



b cone C inches high 



c cone 4 incites high 



d 8 inches high 



Oblong mound with 

 cones of 6 inches to 

 a foot height on top. 



2 holes each about 3 

 feet diameter. 



91 



89 



151 



150 



141 



153 



156 



a 143 



6 144 



c 144 



105 



128 



a 105 



6 112 



c 102 



a 103 



b 110 



125 



335 



142 



1R8 



107 



also 

 &136 



a 148 

 6 148 

 c 130 

 d 108 

 147 



83 

 90 

 63 

 91 

 a 141 

 6 141 

 117 

 84 

 115 





10.30 a.m 



2.40 p.m.- 

 3.15 p.m.. 



65 



Eemarts. 



In a rather isolated depression. 



These are on the same ridge 

 of deposit with 34, 35, 36, and 

 37, only further north, where 

 it is much lower and over- 

 grown with pines. 



Lake like pond. 



Round spring near 30 and 31. 



These are small holes on a 

 ridge or mound of deposit 

 similar to that of 34-38. 



One of several oozes further 

 down the ridge of 39. 



Spring on low mound. Beyond 

 are several old cones. 



6 and c are oozes nearer the 

 road than a. 



Between 42 and the road. 



Nearest to road. 

 Low mound next to the Glen 

 Grotto. 



At the north base of the Glen 

 Grotto; between a and 6 is a 

 dead cone. 



a and 6 are at the north end ; a 

 is coated with sulphur ; 6 is 

 a bulger, and with a spurts 

 a few inches ; c, d, and e l)ub- 

 ble slightly, and are at the 

 south end of the mound. Be- 

 tween the two groups are 

 dead cones. 



Conical mound in broad basin. 



I On the river's edge ; there are 

 > others near these. These 

 t three are close together. 



DESCRIPTION OF THE SPRINGS. 



No. 1. — There are here two basins with two springs each {a and h, e 

 and d). They are opposite the cabin on the lower level, and have hard, 

 white basins. The greatest amount of water gushes out at c and spreads 

 out over a sulphur-lined, shallow basin; in this are filament-like threads 

 of sulphur-covered deposit. Below, the water has formed shallow pools, 

 some of which have a red lining. Back of the springs are old basins 

 reaching as far as the Bee Hive cone. These springs occupy the i)lace 

 where, in 1871 and 1872, we saw the delicate, pink-tinged shallow basins. 

 The temperatures (161°, 161^-°, and 162o F.) are the same as those of 

 the second terrace of 1872 (springs 56 and 57 of table, page 123, Eeport 



