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, . 
344. 
do. cavities lined with drusy quartz, 
Fort Union. 
309. 
Grayish indurated sand, . . . . 
345. 
Dove-colored clay, metamorphosed by burn- 
310. 
Dove-colored calcareous shale, with Unios 
ing out of lignite beds, 
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, 
do. 
348. 
do. yellowish do. do. . 
do. 
313. 
Lignite, bright and compact, . 
do. 
349. 
do. black compact do. . 
do. 
314. 
Drab indurated clay, .... 
( Higlt butte, Lit- 
1 tie Missouri. 
350. 
do. green vitreous do. . 
do. 
315. 
Light-colored marl, with impressions of di- 
351. 
do. do. do. do. . 
do. 
cotyledonous leaves, .... 
Fort Union. 
352. 
do. red, very porous do. . 
do. 
31G. 
Earthy lignite, ...... 
do. 
353. 
do. brown, very porous do. . 
do. 
317. 
Lignite, ....... 
Yellowstone. 
354. 
Shale burned red, with vegetable impressions, do. 
318. 
do. more impure, 
do. 
355. 
do. bright red, do. 
do. 
319. 
Concretions sulphuret iron,common through 
. 
356. 
do. vermilion, with gypsum, 
do. 
out Tertiary series, .... 
do. 
SSGj 
. Shale, burned black, ferruginous, 
do. 
320. Septaria, spherical, ..... 
Fort Union. 
357. 
Calcareous pumice from burning of limestone do. 
321. 
Carbonaceous indurated clay, charged with 
B. White llicer Basin. 
vegetable remains, freshwater and land 
Bed A. 
shells, Bulimus, Physa, Pupa, &c., 
do. 
358. 
Red sandy clay, containing pebbles, base 
322. 
Mineralized wood, ..... 
do. 
of Titanotlierium bed, .... 
On Shyenne river. 
323. 
Carbonized wood from lignite bed, . 
do. 
359. 
Teeth of Titanotlierium. Prouti, 
Old Woman's fork. 
324. 
Light sandy marl, ..... 
do. 
360. 
Coarse whitish sandstone, above No. 358, 
Shyenne river. 
325. 
Shell marl, containing freshwater shells, . 
do. 
361. 
do. concretionary, 
do. 
326. 
Impure lignite, ..... 
do. 
362. 
Soft whitish calcareous sandstone, with 
327. 
Light-colored fine clay, under lignite bed, 
do. 
scales of mica, ..... 
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, ...... 
do. 
365. 
Plates of chalcedony, .... 
Bear creek. 
330. 
Gray shell limestone, soft, 
do. 
366. 
do.. 
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. Dark chalcedony, ..... 
do. 
shells, ....... 
Red spring. 
370. 
Magnesite,. 
do. 
334. 
Gray calcareous sandstone, with Unio,Falu- 
371. 
Calcareous concretion separating bed a from 
dina, &c.,. 
Yellowstone. 
bed b, . .. 
do. 
335. 
Soft argillaceous limestone, with Paludina 
Bed B. 
trochiformis, ..... 
Powder river. 
372. 
Pinkish indurated marl, . 
do. 
336. 
Crystallized carbonate of lime in concretions, 
Fort Union. 
373. 
Whitish do. from over No. 372, 
do. 
337. 
Dove-colored argillaceous limestone, with 
374. 
Pinkish calcareous concretion, . 
do. 
impressions of ferns, over No. 315, 
do. 
375. 
Decomposed marl from Nos. 372 and 373, 
do. 
338. 
Brown calcareous shale, with Taxites, 
Yellowstone. 
376. 
do. do. with Oreodon, 
do. 
339. 
Silicified wood, ..... 
do. 
Bed D. 
340. 
do. partially carbonized, . 
do. 
377. 
Cream-colored marl, .... 
White river. 
341. 
do. do. ... 
do. 
378. 
Silicious limestone, with freshwater shells, 
342. 
do. do. ... 
do. 
Planorbis, Limnea. &c., 
do 
