OF THE UPPER MISSOURI. 
135 
MINERALS AND GEOLOGICAL SPECIMENS, continued. 
Werdiusion No. 3. 274. Soft argillaceous shale, . . . Yellowstone river. 
240. Soft yellow limestone, with Inoceramus - , ih a t blueli Ages 
problematicus, . . Big Sioux. : taining great numbers of fossils, do. 
241. Gray marl, with Ostrea ee and fish ates ce containing’ large crustacean 
remains (base of No. 3), - Mouth Jamesriver. seg - een Whack do. 
242, do. eT ear oo oe do. a ee: 
243, Scale of Cyclocladus in No. 242, Ps ing nucleus 0 sonteaion; : . Forks of Shyenne. 
244, Fibrous carbonate of lime, with Ostrea con- 278, Crystals of selenite, « : do. ~ 
gesta attached to surface, . Dorion’s hills. 279. Blue indurated clay, with fibrous aypres) do. 
280. Dove-colored laminated shale, . . Grand river. 
245. Yellow marl, . ‘ Be eae do. : spi 
- ‘ 281. Petrified wood,.bored by Zeredo bisinuata, 
246. do. ee ‘ . . . Bijoux hills. 
, 282. “Cone in cone” (No. 241), . Cannon-ball river. 
247. do. Fightity. 2.5. t ce tea ® do. : : 
248, © ae bonate of lime, seamsin marl, i 283. Indurated clay, with shells,’ . .  ~ Grand river. 
eas : 284. Soft micaceous sandstone, thin seams in 
249, do. stieitites in marl, : re 
250. Black plastic clay, upper part of No. 3, . Near en hills. Cay bet, ee ae ey eee 
251. Shal ‘lla cd Bh secaatecuae 285. Vertebra of Mososaurus, . : do. 
‘ r 
eae Eee 286. Wood bored by Xylophaga Stenpsond} - Mussel-shell river. 
No. 250, do. 
; 3 287. White aluminous clay, . . «~~ ~ Fort Lookout. 
252. do. calcined by combustion of 
No. 250, ° ° * . . . do. Formation No. 5. 
Formation No. 4. 288. Yellow arenaceous limestone, with Venus, Head of Little Mo. 
253. Blue clay, with Pfychoceras Mortoni, . Greatbendof Miss. | 289. do. enh balagd. oil ae set, oe do. 
254. Yellow clay, with crystals of gypsum, . do. 290. Yellowish cal istone,with Cyprina C ball river. 
255. Whitish alum clay, seams in No. 253. —. Bijoux hills. 291, do. do. decomposed, do. 
256. Hyd. silicate of magnesia, masses in forma- 292. Soft fine sandstone, with Rostellaria, . do. 
tion No. 4, : do. 293. Ferruginous sandstone, with Cytherea, do. 
257. Crystals iis bargta,. do. 294. Silicified wood, with bark, . . Long lake. 
258. White aluminous earth in seams, do. 295. bored by Teredo globosa, do. 
259. Aluminous clay (No.255), . . + do. 
260. F . So a a ee do. TERTIARY. 
261. Crystalli gill » 4 4 (Cc =] 1 Lignite yee ie 
,° . : ‘ . . . Shyenne river. 
262. Crystals of selenite in clay beds, . . Fort Pierre. 296. Yellow C kk 
263. Selenite and fibrous carbonate lime, . . Mouth Shyenne. | 297. Yellowish indurated din, with ilaaine 
264. Yellow clay, with selenite, é . 12m.ab.Ft.Pierre. shells over No. 296, . « + «+ Long lake. 
265. Dark, argillaceous, shale, with ianeabionns } no 298. Gray sand, fine, over No. 297,. + + do. 
266. Blue oo limestone, with Rostel- 299. Coarse,gray,calcareous sandstone, wh fossils, Topof Square butte 
lari . Long lake, Miss. | 300. Softargillo calcareous shale, w’h fossil shells, Thunder butte. 
267. ‘eter ‘tas er ty ee do. 301. Ferruginous oo with pons — do. 
268. Decomposed shale (No. 253), « . .  .» Fort Pierre. 302. Dove e 00 do. 
269. Brown hematite, io te . Big Shyenne. 303. Yellow indurated aad, with estuary shell 
270 : more earthy, : . _ sett 2% ee : : ane ao 
271. Dog-tooth spar, . . . + «+ Musselshell river. | 304. Li aseof section, Fort Clar 
272. Gray arenaceous limestone, . Milk river. 05. Dark carbonaceous sigs over No. 304, do. 
273 do. 306. Lignite, over No. 305, do. 
with carbonized matter <a 
shells, . . Cannon-ball river. 
307. 
Dark argillaceous shale, over No. 306, 
