174 REPORT UNITED STATES GEOLOGICAL SURVEY. 



DESCRIPTION. 



J^os. 1, 2, 3, and 4 do not deserve special mention. 



No. 5, Locomotive Spring^ is probably the most important spring in 

 tlie group. It has a black basin, 4 by 4 feet, of boiling water, from 

 which there is a strong overflow through a black-lined water-way. The 

 temperature in the basin is 200° F. 



Alongside the spring is a steam vent, evidently connected with the 

 spring, from which the steam escapes with a sound that at a little dis- 

 tance exactly resembles the escape from the waste-pipe of a locomotive. 



The next spring I will mention is — 



No. 10, which has a basin 25 feet in diameter, in which there is a fissure 

 from which the water boils. The deposit about this spring is black and 

 /White. Back of it is a red spring. 



No. 11 is a rectangular pool measuring 5 by 7 feet, in which the 

 water has a black, inky tint, with a temperature of 197° F. The border 

 is of hard, white, scalloped geyserite, with a black edge. Arm-like pro- 

 cesses extend out into the spring. 



Below Nos. 10 and 11 are two lake-like ponds. As shown on the map, 

 there are other springs in the vicinity that were not examined. Those 

 to be described next are across the creek, i. e., on the east side. 



No. 13. This is a large, flat spring, about 45 feet in diameter, with ter- 

 races outside. It is lined with a leathery-like substance (viandite ?), 

 and in the center is a basin or bowl about 3 feet in diameter. The tem- 

 perature is only 123° F. 



No. 14 is a white and gray pebbled basin, 7 feet in diameter, flat, with 

 a central o;?ifice which measures about 2 feet across, and from which the 

 water rises in pulsations or bulges, which sends waves to the sides of 

 the basin. Nos. 15, 16, and 17, described in tlie table, complete the sub- 

 group. 



1 have tried to compare the temperatures I obtained with those ob- 

 tiiined in 1871, and indicated on the map then prepared, but find it im- 

 l)ossible to identify the springs on the latter. The highest temperature 

 given there is 196° and the lowest 142°. 



Of the subgroup next to be described, Nos, 18 to 20, inclusive, are on 

 the east side of the creek, partially concealed by timber. They nearly 

 all have broad, circular mounds a foot or two in height. The springs 

 are handsome, but it was late in the evening when we plotted the springs, 

 and little time was allotted to their detailed examination. 



No. 22 is a pear-shaped, greenish-brown basin 20, feet in length and 

 10 feet wide at the widest part. On the north side the rim was a foot 

 high. The temperature was 105° F., one of the lowest recorded in the 

 group. 



No. 26 is of similar shape but with a white border. No. 18 had the 

 highest temperature (198° F.), being a boiling spring. 



These springs are surrounded by an area of white siliceous deposits 

 and are back from the creek some little distance, and Nos. 24, 25, and 26 

 are separated from the others by timber. There is no aijpreciable drain- 

 age from any of the springs. 



Crossing the stream, now, we find a large number of springs (Nos. 27 

 to 52), many of which are very interesting. We were obliged to work 

 rapidly in examining this subgroup and the table therefore contains 

 most of the information obtained. Besides the springs there enumerated 

 there are many minor ones besides mere vents that are not included in the 

 table, as it was impossible in the limited time to map any but the main 

 springs. 



