154 GEOLOGICAL SURVEY OF THE TERRITORIES, 



^v:ltl•l', it must, in a flioiiiica] system, Ix' referred to that species ; but, taking- into con- 

 sideration the specific ui'avity, tin,' small percu'utagti of water, and the circnnistaneiis 

 under which the mineral is formed, I wish to distinguish it as a well-delined siih-si)e- 

 cies of o])al, and jiropose to name it *' I\u}itc" as you were the fust to iiud and col- 

 lect the mineral. 



Very respectfully, 



FREDERIC M. ENDLICH. 

 Dr. A. C. Peale. 



The following are analyses by Dr. Entllicli of specimens from the same 

 locality. The first is from the top of one of the cones, and is a typical 

 specimen of geyserite. It is one of the latest formetl and iscoveretl with 

 beantifiil bead like processes, having a pearly Inster. The second 

 specimen is also from the Giant Geyser, but is from one of the lower 

 layers and is nuK^h older. It is opaloid and in layers some of which 

 are white and others red. The latter have a llesh-color, like raw-beef. 



Analysis of specimoi iVo. 1. 



Percent. 



Loss cu iguitiou -10.42 



Silica 79. 5G 



Lime 1. 54 



Alumina . 04G 



Maguesia 1. 78 



Iron , Trace. 



Chloriue Trace. 



Soda* Trace. 



Total 97.76 



Ancdtjsis of sjyecimen iVo. 2. 



Per cent. 



Loss by ignitioii G. '25 



Silica 92.64 



Lime • 1. 03 



Ferric oxide 0. 60 



Alumina Trace. 



Magnesia Trace. 



Soda* Trace. 



Strontia'' Trace. 



. Total , 100.52 



Fig. 39 is an illustration of one of the minor geysers of the Upper 

 Basin. 



The Groito Geyser is 400 feet northwest from the Giant, and separated 

 from it by a line of trees. There are two cones which spont alter- 

 nately dnring the eruption. The larger one, which we will call No. 1, is 

 very irregular and is 8 feet in height. The tube from which the water 

 is i)rojected measures feet by 2 feet and is ID feet deep. The other 

 cone, Xo. 2, is 10 feet in diameter at the base and 1-4 ou top. It is 4 

 feet high, anil the orifice on top is quadrangular in shape, measuring 

 5 feet by 3 feet. When not in action the water is from 10 to 15 feet 

 below the toj). The basin is 1(5 leet deep. The entire length, including 

 both cones, is 5.'^ feet and width 20 feet, the centers of the two being 

 30 feet apart. 1'he plan shown in Fig. 40 gives the relation of the two. 

 Between thorn there are two small geyser-tubes which s])out whenever 

 the main cones are in action. The eruptions consist of a series of jets 

 averaging about 20 per minute. 



* Spectroscopic cxaminatiou. 



