136 
ON THE GEOLOGY AND NATURAL HISTORY 
MINERALS AND GEOLOGICAL SPECIMENS, continued. 
. Yellow indurated sand, with Paludina and 
Melania, 
. Grayish indurated pe . 
- Dove-colored calcareous shale, a Unios 
and other freshwater shells, . . Red s 
. Argillaceous limestone, with fossil plants, Fort Berthold. 
Fine light-colored marl, under lignite bed, - 
. Lignite, bright and compact, 
- Drab indurated clay, =. ee tle Missouri. 
315. Light-colored marl, with impressions ios ai 
cotyledonous leaves, . . «. ~ . Fort Union. 
Sibi ee ee ee 8 do. 
317. Lignite, . See eee eee fs 
318. do. moreimpure; . .  . do. 
319. C re Iphuretiron, throug! 
out Tertiary series, . 10 es do. 
320. Septaria, spherical, . . Fort Union. 
321. Carbonaceous indurated ia pati with 
vegetable remains, freshwater and land 
shells, Bulimus, Physa, Pupa, &e., . do. 
322. Mineralized wood, do. 
323. Carbonized wood frei lignite Sede ° do. 
324. Light sandy marl, . . do. 
325. Shell marl, containing Poailivabee shells, : do. 
326. Impure lignite, do. 
327. Light-colored fine clay, aes lipnite bed, do. 
328. Brown shale, with vegetable impressions, . Milk river. 
. Silicious shale, Ata much vegetable 
matter, 3 “ ° do. 
: bine shell limestone, sot, + oti raed do. 
Unio, Paludina,&e., Yellowstone. 
. Coarse gray shell shisha; ‘ 
. Compact bluish cue with freshwater 
shells, . 
- Elk Horn prairie. 
- Red spring. 
G i dst , With Unio, Palu. 
tie, &e., - Yellowstone, 
. Soft argillaceous ieson ids Paludina 
arenes, 
Cryst bbe P| 
‘ - Powder river, 
, Fort Union. 
. Dove-cebsedd argillaceous limestone, with 
impressions of ferns, over No. 315, 
338. Brown calcareous shale, with Tazites, 
ri: 
m do. 
- Yellowstone. 
339. Silicified wood wood, : ‘ do. 
340. do. partially leads, . do. 
341. do, do. do. 
342, do. do. ‘ do. 
3 
Hick butte, Lit- 
- Yellowstone. 
cavities lined with drusy quartz, Fort Union. 
343. Silicified wood, partially carbonized, 
44, do. 
345. Dove-colored clay, metamorphosed by burn- 
ing out of lignite beds, - Mussel-shell river, 
346. Brownish shale, oy . do. 
347. Scoria, black, formed by do. do. . Yellowstone. 
348. do. yellowish do. do. . do. 
49. do. black compact do. do. 
350. do. green vitreous do. . do. 
351. do. do. do. do. do. 
352. do. red, very porous do. do. 
353. do. brown, very porous do. . do. 
354. Shale burnedred, with ain eas do. 
do. bright red, do. do. 
356. do. vermilion, with gypsum, do. 
3564. = burned —" ren g é do. 
357. I gof limestone do. 
B. White River Basin. 
Bed A 
358. Red sandy clay, containing pebbles, base 
of Titanotherium bed, . - On Shyenne river. 
359. Teeth of Titanotherium Prouti, » Old Woman's fork. 
360. Coarse whitish sandstone, above No. 358, Shyenne river. 
do, concretionary, . do. 
362. Soft whitish caleareous endeonk. with 
scales of mica, . do. 
do. 
363. Greenish plastic clay, : 
do . Sage creek. 
+ 
upper part, 
365. Plates of chalcedony, . . Bear creek. 
do 
2 do. 
367. ee do. 
368. Fibrous carbonate of lime, do. 
369. Dark chalcedony, . . do. 
ibe riccs un Se oe do. 
371. Cal tion separating bed afi 
hie: .. eae 
Bed B. 
372. Pinkish indurated marl, . . do. 
373. Whitish do. from over No. 372, do. 
374. Pinkish calcareous concretion, . do. 
375. Decomposed marl from Nos. 372 a 373, do. 
376. do. do. with Oreodon, do. 
Bed D. 
377. Cream-colored marl, . White river. 
378. Silicious limestone, with ‘choaian athe 
Planorbis, Limnea,&e., . . . do 
