CHEMISTRY OF DEPOSITS GEYSERITES PEALITE. 



Tal)le of analyses of Iceland geyserites. 



413 



No. 



Analyst. 



Si02. 



HsO. 



AI2O3. 



Fe203. 



CaO. 



MkO. 



NaaO. 



KsO. 



SO4. 



Total. 



1 



Klaprotli 



Kersten 



Damour 



Bickel 



98.00 

 94.01 

 92.59 

 91.56 

 91.23 

 88.26 



87.67 



84.43 



"Tio" 



7.41 

 5.76 

 8.97 

 4.79 



10.40 



7.88 



1.50 

 1.70 



0.50 













100. 00 



2 













99.81 



3 















100. 00 



4 



1.04 



0.18 



0.33 



0.47 



0.16 



0.19 



0.31 



100. 00 



5 . ... 



Damour 



Bickel 



lUO. 22 



6 



0.69 



3.26 



0.29 

 0.40 

 0.70 



1.06 



0.11 

 0.82 



0.11 

 trace. 



2.49 



100. 00 





Damour 



Forclihammer . . 





7 



0. 

 3.07 



71 



1.91 



100.00 



8 



0.92 



99.97 



!N"OTE. — These analyses are taken from Dana's Manual Nos. 1 and 2 ; resemble Pealite in their proper 

 tion of silica and ■water, but we do not know their physical structure. 



Tahle of analyses of Neto Zealand geyserites. 



Spring and location. 



Analyst 



SiOj. 



H2O. 



Mallet . . . 



94.20 



3.06 



Mayer . . . 



88.02 



7.99 



Mayer . . . 



86.80 



11.61 



Mayer . . . 



86.03 



11.52 



Mayer . . . 



84.78 



12.86 



Mayer . . . 

 Pattison . 



79.34 

 77.35 



14.50 

 7.66 



AL03. 



re,o,. 



CaO. 



MgO. 



ISTajO. 



KoO. 



Total. 



Is car Lake Taupo 



■Whatapoho at Lake 



Kotomabana 



Otakapuarangi at 



Lake Kotomahana. 

 TeTarataatLakeRo- 



tomahana 



Te Tarata at Lake Eo- 



tomahana.- 



Great ISTgahapu at 



Lake Kotomahana. . 

 Near Lake Taupo 



1.58 



0.17 



2.99 

 trace. | trace. 

 1. 21 ' 



trace. . . . 

 0.64 



trace. 

 0.45 



trace. 

 0.40 



0.85'' 



0.40 "" 

 trace, trace. 



1.27 



3.87 

 9.70 



0. 38 I 0. 38 



1.27 



L34 

 3.72 



0.27 

 1.74 



1.09 

 0.26 



L09 



0.42 



99.86 



100. 04 



98.41 



99.99 



100.00 



100. 00 

 100. 17 



'^NaCl. 



In 1872 specimens were obtained from the lower exposed layers in 

 tlie platform of the Giant Geyser in the Dpper Fire Hole Basin that 

 were harder than any obtained before, and had a close resemblance to 

 opal. The specimens were white, red, and green, and were examined 

 by Dr, F. M. Endlich, who analyzed them and named them Pealite* 

 In 1878, similar specimens were obtained from the Shoshone Basin, the 

 Heart Lake Basin, the Gibbon Basin, and the Fire Hole Basins. Some 

 of these specimens were analyzed by Dr. Leffmann, and the results are 

 presented below. 



Ko. 1. Specimen from near the Blade Sand Geyser, in the Upper Geyser 

 Basin of Fire Hole River. — This specimen is of a pinkish color, some- 

 what translucent in places, haying a hardness of 6.5 to 7 and a fracture 

 somewhat conchoidal. 



ANALYSIS. 



Silica 



Ft'rric oxide . 

 Water 



Per cent. 

 .. 94.0 

 .. 1.0 

 . . 5. 3 



100.3 



No. 2. Specimen from Yellow Crater Spring, in the Shoshone Geyser 

 Basin. — This specimen has an opaque, porcelain-like appearance, and 

 occurs scattered over the mound in small i)ieces, reminding one of 

 broken china. 



'Report of U. S. Geol. Survey of the Territories for 1872, p. 153. 



