134 
ON THE GEOLOGY AND NATURAL HISTORY 
MINERALS AND GEOLOGICAL SPECIMENS, continued. 
168. 
169. 
170. 
alla 
172. 
173. 
174. 
175. 
176. 
177. 
178. 
179. 
180. 
181. 
182. 
183. 
184. 
185. 
186. 
187. 
188. 
189. 
191. 
192. 
193. 
194, 
195. 
196. 
197. 
198. 
199. 
200. 
201. 
202. 
Arenaceous limestone (No. 166), with 
leaves of Credneria, Melanias, &c., . Badlands ofJudith 
Indurated ferruginous clay, with Melanias, do. 
Ferruginous sand, with Unio danat, do. 
Indurated clay, with Melanias and scales 
of Lepidotus above No. 166, do. 
Shell limestone, containing Melanias, do. 
Impure sandy lignite (stratum D of section), do. 
Shell limestone, same as No. 172, do. 
Cream-colored shale, burnt from over lig- 
nite beds, 0 do. 
Compact argillaceous limestone, with Cy- 
therea Owent (marine), beneath fresh- 
water beds, . . 5 - 0 do. 
Ferruginous sandstone, with Tellina sub- 
tortwosa, 5 P do. 
Rough, gray, limestone, with Ostrea glabra, do. 
Ferruginous sandstone, with Inoceramus 
pertenuis, upper marine strata, do. 
Lignite, over No. 179, do. 
Carbonaceous sand from decomposition of / 
lignite bed over No. 179, | Rocky mountain 
Impure shaly lignite, with selenite, . . Near Ammel’s Is. 
Limestone, with Cypris, lower part of for- 
mation No. 1, . Black hills, E. base. 
Silicified wood, ferruginous, do. 
do. coniferous, do. 
Bone of saurian, do. 
do. or cetacean, . do. 
Dense ferruginous sandstone, . . Blackhills, W. base 
Quartzose sandstone, bluish, do. 
Conglomerate from junction of cretaceous 
and carboniferous rocks, . 0 . Platte valley. 
Coarse ferruginous sandstone, with peb- 
bles, over No. 199, do. 
Dark ferruginous sandstone, over No. 192, do. 
do. containing much iron, do. 
do. do. do. 
Ferruginous sandstone, . Blackbird hill. 
do. fine-grained, . . Mouthof Elk Horn. 
Dark, coarse, sandstone, very ferruginous, do. 
Red, ferruginous sandstone, with many spe- 
cies of dicotyledonous leaves, Black hills. 
do. do. 
Light gray quartzose sandstone, with balls 
do. 
do. 
of sulphate of iron over No. 199, 
do. with dicotyledonous leaves, 
203. Whitish pulverulent sandstone, over No. 199, Sioux city. 
204. do. fine-grained under No. 199, Blackbird hill. 
205. Indurated clay, bluish, do. 
206. do. yellow, . Decatur. 
207. do. do. do. 
208. Ferruginous sandstone, with striated bi- 
valves, and Cytherea arenaria, . Big Sioux. 
209. Indurated clay, with dicotyledonous leaves, do. 
210. do. sand, fine, yellow, with leaves 
of salix, . do. 
211. Ferruginous sandstone, ioe @! love 
212. do. do. _ fine-grained, with 
impressions of dicotyledonous leaves, Mouth Big Sioux. 
213. do. with Solen Dacotaensis, do. 
214. Lignite under No. 209, 5 do. 
215. Silicified wood, bored by teredo, . Big Sioux. 
216. do. do. . Blackbird hills. 
217. do. do. . Smoky hill fork. 
218. do. do. . Republican fork. 
219. Coarse, ferruginous sandstone, with leaves 
of Credneria, . Smoky hill. 
220. Sandstone, very ferruginous, do. 
221. Cellular, ferruginous, rock, do. 
Formation No. 2. 
222. Masses of sulphuret iron, with sulphate, . Mouth of Vermi- 
223. Crystallized do. do. do. [lion. 
224, do. gypsum, 0 do. 
225. do. do. 2 ° do. 
226. do. in plates, . 0 F 0 do. 
227. Large crystals selenite, in black clay, do. 
228. do. do. do. do. 
229. Ferruginous shale, with remains of fishes,. do. 
230. do. shell limestone, do. 
231. Yellow clay, with gypsum, 0 : do. 
232. Conglomerate, with green silicious pebbles, do. 
233. do. with shark’s teeth, do. 
234, Gray arenaceous limestone, with Cytherea 
orbiculata. do. 
235. do. do. with fish-scales. do. 
236. Dark gray indurated clay, with fish scales, Black hills,H. base. 
237. Arenaceous limestone’ (No.234), with Ser- 
. Dixon’s bluffs. 
do. 
pula, . 0 . 0 
238. Conglomerate, with fish teeth, . 
239. Arenaceous limestone, gray, with Inocera- 
. Blackhills, W. base 
mus problematicus, 
