Aug. 13, 1917 



Origin of Alkali 



345 



magnesium. As in the Cretaceous sandstones, the sodium salts are 

 entirely absent. There are 1,904 pounds of calcium bicarbonate present 

 in 2,000,000 of sandstone, 2,621 pounds of calcium sulphate, 1,175 

 pounds of magnesium sulphate, 1,426 pounds of magnesium chlorid, 

 and 2,530 pounds of magnesium nitrate. Again, there is a slight excess 

 of magnesium which, no doubt, is united with phosphoric and silicic 

 acids. The soluble salts in the sandstone amount to 0.45 per cent. 

 The results of the analysis of the Tertiary shales are recorded in 



Table IX. 



Table IX. — Soluble salts in Tertiary shales 



[Results expressed as pounds per 2.000,000 of material] 



Field No. 



3°- 

 310. 

 236. 



308. 

 300. 

 232. 

 299. 

 223. 

 307- 

 304- 

 233- 

 36.. 

 305- 

 215- 

 222. 

 229. 

 208. 

 272. 

 205. 

 210. 



33- ■ 

 211 . 

 212. 

 213. 

 306. 

 32-- 

 39- ■ 

 214. 



Average . 



Location of sample. 



Richfield, Utah. 

 Utahn, Utah. . 

 Lyman, Wyo. . . 

 Sigurd, Utah... 

 Utahn, Utah. .. 

 Myton, Utah. . . 

 Lyman, Wyo. . , 

 Myton, Utah. . . 

 Lyman, Wyo. . . 

 Myton, Utah. . . 



do 



Lyman, Wyo. . , 

 Sigurd, Utah. . . 

 Myton, Utah. . . 

 Millbum, Wyo. . 

 Lyman, Utah . . 



do 



Millbum, Wyo. . 

 Vernal, Utah. . . 

 Millburn, Wyo. . 



.....do 



Sigurd , Wyo . . . 

 Millbum, Wyo. . 



do 



do 



Myton, Utah. . . 

 Sigurd, Utah. . . 

 Richfield, Utah, 

 Lyman, Wyo. . . 



Tertiary. 



Calcium 

 (Ca). 



54, 920 



722 

 722 



25,904 



722 



6,576 



561 



160 

 I, 600 



241 



321 



4, 813 



5,936 



160 



240 



5,133 

 481 



1,764 

 882 



3,849 

 21, 412 



1, 042 

 321 

 401 

 321 



2, 406 

 642 

 962 

 560 



7,316 



Magne- 

 sium 

 (Mg). 



5,680 



1,267 



262 



3,503 



1,468 



646 



873 

 960 



489 



1, 136 

 314 

 786 



2, 009 

 262 

 411 

 856 



507 

 1,223 



873 

 1,800 

 3,512 



None. 



..do... 



-.do... 



...do... 



1,380 



363 



114 



None. 



1,058 



Carbonic 

 acid 

 (CO3). 



I, 200 



I, 080 



I, 200 



480 



1, 480 

 480 



2, 840 

 2, 000 

 I, 600 

 3,120 

 I, 640 



920 

 320 

 600 

 2,480 

 640 



1, 720 

 800 



3,000 



6, 400 

 760 

 800 

 880 



2, 080 

 2, 720 



800 

 320 

 580 

 720 



1,307 



Sulphuric 

 acid 

 (SO4). 



13,252 

 5,235 

 1,580 



60, 800 

 I, 646 

 923 

 9,944 

 1,811 

 7,572 

 1,877 

 5,531 

 4,974 

 1,409 



1, 908 

 3,720 



37,828 



1,086 



6,058 



4, 280 



16, 296 



67, 984 



2, 204 

 None. 

 Trace. 

 None. 

 71, 800 



3,391 



699 



None. 



18,341 



Chlorin 

 (Cl). 



12,052 

 8,706 

 8,224 



35,876 



2,797 

 20, 704 



7,656 



2,326 

 711 

 284 

 681 



2, 269 



2,474 



1,702 



284 



709 

 1,418 



850 

 Trace. 



567 

 ^ 567 

 Trace. 

 Do. 



142 

 Trace. 

 Do. 

 Do. 



213 

 Trace. 



4,603 



A comparison of these shales with the Cretaceous shales brings out a 

 number of interesting points. Less magnesium and more chlorin is found 

 in the shales of Tertiary origin, and there is more calcium and carbonic 

 acid and less sulphuric acid. A marked difference occurs in the amount 

 of chlorin present, there being over seven times as much chlorin, on an 

 average, in the Tertiary shales as in the Cretaceous. This is the most 

 conspicuous difference. 



