PEALE.] 



GIBBON GEYSER BASIN. 



125 



is the first published. He refers to them on page 6 of his report for 

 1878 and page 16 of the report for 1879.* 



Our time in this basin was limited, and we mapped only the springs 

 in the immediate basin through which the wagon road passes. 



In the following table is a list of the springs of which the tempera- 

 tures were recorded, and following it is a description of the springs that 

 were mapped, the numbers corresponding with those of the accom- 

 panying map. The relative position of these springs will be appreciated 

 by comparing this mai3 with the geological map of the Park. 



Table of Gihion Geyser Basin Springs. 



INumber or name. 



Size. 



ft 

 i 





n 



Eemarks. 



2 , 



Fissure 10 feet long 



2 by 3 feet is size of fis- 

 sure ; outside basin is 

 20 feet diameter. 



40 by 50 feet diameter. . . 



°F. 

 J 97 



195 



*186 



*190 



155 



182 



90 

 180 

 162 



180 

 180 

 175 

 175 

 186 

 176 

 161 

 142 

 117 



102 



°F. 







4 







by. 

 Steam bulges sligbtly. 



Handsome yellow-green pool. 



5. Emerald Spring . . 

 9 











14 



25 by 30 feet 







Turbid bulging pool. 



Bulger, sending water foot or 



two. 

 Opalescent tint to water. 



16 



8 feet diameter 



63 



10.45 a. m. 







45. EcMmis Geyser.. 

 68. Pearl Geyser 



70 



40 feet diameter 







Basin 25 feet diameter ; 



central orifice 5 by 6 



feet. 

 Basin is 20 feet diameter. 







Water rises and falls periodi- 

 cally. 







79 







Muddy sulphur spring. 

 Small sulphur pool near No. 79. 

 Black sulphur spring. 

 Clear green sulphur spring. 

 Sulphur spring. 

 Do 











81 



10 by 15 feet 



42 



10 a. m 



82 





83 





42 





96 







97 





51 



12.15 p. m. 



Green sulphur pool. 



98 





101 





60 



Ip. m 



like openings at the bottom. 

 Milky-bluo pool in salmon-yel- 

 low basin. 







* On the edge. 

 KOTE. — This table gives only those springs of which the temperatures were recorded. 



DESCRIPTION. 



Springs Kos. 1, 2, 3, 4, 5, 6, and 42 are located on the hill which sep- 

 arates the two main groups of the basin. The first four are west of the 

 wagon road on a bare summit, and are described as follows : 



No. 1 is a milky, green, sulphur pool about thirty feet diameter, in 

 which the water is violently agitated, splashing from three to four feet 

 above the basin, and frequently sending spurts to the height of 8 or 10 

 feet with a great escape of steam. The temperature could not be taken 

 as the bank surrounding the spring was soft and unstable. If at any 

 time there is an overflow from the spring it probably goes to the gulch 

 north of it. 



ifos. 2, 3, and 4 are at a little lower level than ISTo. 1. 



* Mr. Norris, in his report for 1881, p. 57, mentions several geysers, calling them 

 Monarch, New Crater, Emerald, Vixen, &c., but I have no means of identifying them. 

 The Monarch, ho says, spouts 100 to 125 feet at an interval of over 24 hours and lasts 

 20 to 25 minutes. 



