Aug. 13, 1917 



Origin of Alkali 



347 



phate. The results obtained on analysis are recorded in Table XI as 

 pounds per 2,000,000 of material. The alkali salts near My ton (sample 

 301) consist in places largely of the sulphate of sodium. This contains 

 943 pounds of calcium bicarbonate, 26,435 pounds of calcium sulphate, 

 3,495 pounds of magnesium sulphate, 847,482 pounds of sodium sul- 

 phate, 2,890 pounds of sodium chiorid, and 113 pounds of sodium ni- 

 trate — that is, a total of 44 per c^nt of this alkali material is soluble in 

 water, and the soluble material is 96 per cent pure sodium sulphate. 

 There are nearly 2 per cent of calcium sulphate, with small amounts of 

 magnesium sulphate, sodium chiorid, and sodium nitrate. 



Table XI. — Soluble salts in alkali of Tertiary origin 

 [Results expressed as pounds per 2,000,000 of material] 



303- 



221. 

 298. 



234- 

 204. 



243- 

 3"- 

 S3-- 

 47.. 



237- 

 301. 

 302. 



52- • 

 230. 

 206. 

 5I-- 



227. 



Field No. 



Location of sample. 



Average . 



Myton, Utah 



Millbum, Wyo. . . . 



Myton, Utah 



Lvman, Wyo 



Millbum, Wyo. .. . 



Superior, Wyo 



Utahn.Utah 



Grass Valley, Utah . 

 Glen wood, Utah. . . 



Lyman, Wyo 



Myton, Utah 



do 



Greenwich, Utah. . 



Lyman, Wyo 



Millburn, Wyo. . . . 

 Greenwich, Utah. . 



Nephi, Utah 



Lyman, Wyo 



Carbonic 

 acidCCOs). 



933 



27, 200 



640 



1, 080 



2, 160 

 920 



14, 600 



2, 000 



480 



800 



I, 840 



560 



800 



I, 080 



3,480 



680 



3,320 



2,440 



2,815 



Sulphuric 

 acid(S04). 



Chlorin 

 (CI). 



227, 800 

 274, 400 

 184, 040 

 125, 600 



74, 996 



16, 832 

 261, 360 

 275,940 

 8,724 

 242,360 

 586, 400 

 180, 320 

 117, 760 



77, 296 

 25S, 040 



10, 024 



3,058 



303, 760 



187,618 



12, 7C0 



Trace. 



1,843 



3, 120 

 2,556 



993 



25,096 



330, 720 



4, 112 

 170 



85 



19, 000 



3.630 



13.328 



425 

 12,478 

 24, 712 



24, 718 



As an average of all the samples collected, the proportion is not so 

 extreme as this. There are 3,800 pounds of calcium bicarbonate, 31,280 

 pounds of calcium sulphate, 37,380 pounds of magnesium sulphate, 

 194,400 pounds of sodium sulphate, 142,020 pounds of sodium chiorid, 

 and 420 pounds of sodium nitrate. 



The soluble-salt content of the clay is recorded in Table XII. There 

 is a marked individual variation in the results from the clay. Samples 

 4, 5, and 12 represent the clay lying immediately above the important 

 salt deposits at Nephi and are really good samples of impure rock salt. 

 Averages of the Tertiary clay, which includes these samples, therefore 

 mean very little. In some individual samples the magnesium salts are 

 entirely absent. Carbonates and sulphates of calcium are always pres- 

 ent. With the exception of two cases, chlorin is always present. 



