248 EEPOET UNITED STATES GEOLOGICAL SURVEY. 



Geysers of the Upper Geyser Basin — Continned. 



ifame of geyser. 



Group in "which sit- 

 uated. 



Interval or period. 



Duration of erup- 

 tion. 



Height of col- 

 umn. 









10 to 13 minutes 



li hours to 3 hours. . 



Feet. 

 About 80 





Giant Group 



....do 



A long unknown 

 period. 



130 to over 200 





10 to 30 





do 



Once or twice daUy. 









"White Pyramid 



Group. 

 do 









13 to 22 -minutes* ... 



'Sot positively 

 known as a gey- 

 ser ; spouts daily, 

 but full period not 

 known. 



30 seconds to over a 



minute. 

 Water period 9 to 20 



minutes ; entire 



duration 1 to 1| 



hours. 



30 





....do 





Castle 



Castle GroTip 



50 to 200 





do 











Grand Group 



do 



16 to 31 hours 



About 5 eruptions 

 daily; i.e.in 24 hours. 



10 to 42 minutes 



1| to 3 hours 



95 to 200 



Saw Mill 



15 to 20 



Tardy 



....do 







....do 







5 





....do 



About 15 minutes. . . 



15 seconds to 5 min- 

 utes. 



25 





... do 



5 



Old Faithful 



Old Faithful Group. 



50 to 70 minutes 



3 to 5 minutes ...... 



75 to 150 

 250 





do 



7 to 25 hours 



3 to IS minutes 



About 3 minutes 



About 5 minutes - . . 

 45 seconds to 1 min- 

 ute 10 seconds. 



200 to 219 



Trinitvl 



do 



60 





do 



. . do 



75 



Three Crater 



Three Crater Group 



Interval of quiet 

 average 3 min- 

 utes 57 seconds. 



15 to 20 



* These are the periods bet ween the constant eruptions and not between the great eruptions, the 

 times of which were not observed. 



* Only the larger of the Trinity geysers is noted here ; a second one spurts but not quite so higb. 



CHAPTEE IX. 



THIRD GEYSER BASEST OF FIRE HOLE EIYER. 



The Third Geyser Basin is a little over 2 miles above the falls that 

 are a short distance above the Upper Geyser Basin. This basin was 

 hastily passed through by us on our way irom Shoshone Lake to the 

 Upper Basin, and no time was afforded to examine it closely. I there- 

 fore quote Professor Bradley's description, which is the only one that 

 has been published, the party with which he was connected as geologist 

 being the one that discovered the basin : 



These hi lis {above the falls] soon approach the river again, which has here a very nar- 

 row v^illey. This, however, suddenly widens again into a third geyser basin. The first 

 intimation of hot springs, if we follow up the river bank, is a strong column of steam 

 appearing among the timber on the east side of the valley, just as we enter the basin. 

 Mr. Taggart visited this vent and reported a boiling pool, temperature 190°, over- 

 hung by rocky banks, which showed no signs of spouting. As we emerge from the 

 timber on the west side we find the lower angle of the basin occupied by an area of 

 hot springs, perhaps 500 feet long by 250 feet wide, with the usual floor of disintegrat- 

 ing, siliceous sinter, and containing numerous vents, mostly active. Near the center 

 of this area stands the chimney of a single geyser. This is a dome-shaped mound, 

 averaging 15 feet in diameter, and from 11 to 14 feet high, completely covered with 

 most elegant varieties of the pearly beads before described. It is striped vertically 

 with bands of white, dark green, brownish black, and various shades of yellow and 

 orange, the white being ordinary geyserite, while the other colors are apparently of 

 purely vegetable origin. On the north side of the dome, where the main flow from 

 the eruption is now generally scattered, the geyserite has also a beautiful, delicate, pink 

 tinge. The summit of the northwest side, as seen from the northeast, is ornamented 



