136 ON THE GEOLOGY AND NATURAL HISTORY 
MINERALS AND GEOLOGICAL 
SPECIMENS, continued. 
308. Yellow indurated sand, with Paludina and 343. Silicified wood, partially carbonized, - Yellowstone. 
Melania, . . . 5 5 344, do. cavities lined with drusyquartz, Fort Union. 
309. Grayish indurated ae 3 5 0 6 345. Dove-colored clay, metamorphosed by burn- 
310. Dove-colored calcareous shale, with Unios ing out of lignite beds, 0 . - Mussel-shell river. 
and other freshwater shells, . : - Red spring. 346. Brownish shale, do. do. . do. 
311. Argillaceous limestone, with fossil plants, Fort Berthold. 347. Scoria, black, formed by do. do. . Yellowstone. 
312. Fine light-colored marl, under lignite bed, si 348. do. yellowish do. do. . do. 
313. Lignite, bright and compact, . . . 349. do. black compact do. . do. 
314. Drab indurated clay, : . x 2 | Hh bate, Lit-| 350, do. green vitreous do. . do. 
315. Light-colored marl, with impressions of di- 301. do. do. do. do. . do. 
cotyledonous leaves, . 0 0 . Fort Union. 352. do. red, very porous do. . do. 
316. Earthy lignite, . x . E i i do. 353. do. brown, very porous do. . do. 
317. Lignite, . ; 3 , ¢ ' . Yellowstone. 354. Shale burnedred, with vegetableimpressions, do. 
318. do. more impure, . 0 : do. 355. do. bright red, do. . do. 
319. Concretionssulphuretiron,commonthrough- 356. do. vermilion, with gypsum, ° do. 
out Tertiary series, : h 4 aot 3563. Shale, burned black, ferruginous, . . do. 
320. Septaria, spherical, . . . F PaHocthWiniont 357. Calcareous pumicefrom burning of limestone do. 
321. Carbonaceous indurated clay, charged with B. White River Basin. 
vegetable remains, freshwater and land Bed A. 
shells, Bulimus, Physa, Pupa, &e., . do. 358. Red sandy clay, containing pebbles, base 
322. Mineralized wood, . 5 0 : 0 do. of Titanotherium bed, . 6 5 - On Shyenne river. 
323. Carbonized wood from lignite bed, . . do. 359. Teeth of Titanotheritum Prouti, 0 - Old Woman's fork. 
324. Light sandy marl, . 0 . 0 . do. 360. Coarse whitish sandstone, above No. 358, Shyenne river. 
325. Shell marl, containing freshwater shells, . do. 361. do, concretionary, . 5 . do. 
326. Impure lignite, 0 : : , do. 362. Soft whitish calcareous sandstone, with 
327. Light-colored fine clay, under lignite bed, do. scales ofmica, .- -. . .- . do. 
328. Brown shale, with vegetable impressions, . Milk river. 363. Greenish plastic clay, . . . : do. 
329. Silicious shale, containing much vegetable 364. do. upper part, . - Sage creek. 
matter, ; , P . : , do. 365. Plates of chalcedony, ‘ 4 3 - Bear creek. 
330. Gray shell limestone, soft, . . . do. 366. do. Reece arm so weno yo do. 
331. Carbonaceous clay, with Unio, Paludina,&c., Yellowstone. 367. do. . . : : . : do. 
332. Coarse gray shell limestone, . : - Elk Horn prairie. 368. Fibrous carbonate of lime, : . : do. 
333. Compact bluish limestone, with freshwater 369, 
shells, . : 0 . : - Red spring. 370. 
334. Gray calcareous sandstone, with Unio, Palu- 371. 
dina, &e., . . F 5 3 . Yellowstone. 
335. Soft argillaceous limestone, with Paludina 
trochiformis, . 5 9 3 . Powder river. 372. 
336. Crystallized carbonate of limein concretions, Fort Union. 373. 
337. Dove-colored argillaceous limestone, with 374, 
impressions of ferns, over No. 315, . do. 375. 
338. Brown calcareous shale, with Taxites, . Yellowstone. 376. 
339. Silicified wood, 5 F 0 0 0 do. 
340. do. partially carbonized, . 5 do. 377. 
341, do. do. fe ew bas do. 378, 
342. do. do. : . . do. 
Dark chalcedony, . 0 5 : 0 do. 
Magnesite, 9 . . . : 6 do. 
Calcareous concretion separating bed a from 
bed 8, . . 5 9 . 9 do. 
Bed B. 
Pinkish indurated marl, . 0 5 do. 
Whitish do. from over No. 372, do. 
Pinkish calcareous concretion, . . do. 
Decomposed marl from Nos. 372 and 373, do. 
do. do. with Oreodon, . do. 
Bed D. 
Cream-colored marl, . 5 a . White river. 
Silicious limestone, with freshwater shells, 
Planorbis, Limnea, &e., . . 6 do 
