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  1. Reelsville Limestone Member‏‎ (10 categories)
  2. Big Clifty Sandstone Member‏‎ (10 categories)
  3. Sample Sandstone Member‏‎ (10 categories)
  4. Beaver Bend Limestone Member‏‎ (10 categories)
  5. Eldena Member‏‎ (9 categories)
  6. Castlewood Member‏‎ (9 categories)
  7. Beech Creek Limestone‏‎ (9 categories)
  8. Strawbridge Member‏‎ (9 categories)
  9. Ridenhower Formation‏‎ (9 categories)
  10. Beecher Member‏‎ (9 categories)
  11. Glencoe Member‏‎ (9 categories)
  12. Spechts Ferry Formation‏‎ (9 categories)
  13. Elm Member‏‎ (9 categories)
  14. Victory Member‏‎ (9 categories)
  15. Blomeyer Member‏‎ (9 categories)
  16. Establishment Member‏‎ (9 categories)
  17. Brickeys Member‏‎ (9 categories)
  18. Kings Lake Formation‏‎ (9 categories)
  19. Sinsinawa Member‏‎ (9 categories)
  20. Glenhaven Member‏‎ (9 categories)
  21. Wise Lake Formation‏‎ (9 categories)
  22. Rivoli Member‏‎ (9 categories)
  23. Downeys Bluff Limestone‏‎ (9 categories)
  24. Everett Member‏‎ (9 categories)
  25. Guttenberg Formation‏‎ (9 categories)
  26. Briton Member‏‎ (9 categories)
  27. Eagle Point Member‏‎ (9 categories)
  28. New London Member‏‎ (9 categories)
  29. Sherwood Member‏‎ (9 categories)
  30. Mifflin Formation‏‎ (9 categories)
  31. Forreston Member‏‎ (9 categories)
  32. Abernathy Member‏‎ (9 categories)
  33. Hazel Green Member‏‎ (9 categories)
  34. Quimbys Mill Formation‏‎ (9 categories)
  35. Moredock Member‏‎ (9 categories)
  36. Walgreen Member‏‎ (9 categories)
  37. Fairplay Member‏‎ (9 categories)
  38. Mincke Member‏‎ (9 categories)
  39. Hazelwood Member‏‎ (9 categories)
  40. Dement Member‏‎ (9 categories)
  41. Wall Member‏‎ (9 categories)
  42. Stewartville Member‏‎ (9 categories)
  43. Nachusa Formation‏‎ (9 categories)
  44. Haney Limestone‏‎ (9 categories)
  45. Daysville Dolomite Member‏‎ (9 categories)
  46. Mortimer Member‏‎ (9 categories)
  47. Wyota Member‏‎ (9 categories)
  48. Shullsburg Member‏‎ (9 categories)
  49. Dunleith Formation‏‎ (9 categories)
  50. Stillman Member‏‎ (9 categories)
  51. Buckhorn Member‏‎ (9 categories)
  52. Clement Member‏‎ (9 categories)
  53. Fraileys Shale‏‎ (9 categories)
  54. Grand Detour Formation‏‎ (9 categories)
  55. Hely Member‏‎ (9 categories)
  56. St. James Member‏‎ (9 categories)
  57. Garnavillo Member‏‎ (9 categories)
  58. Negli Creek Limestone Member‏‎ (8 categories)
  59. Tyson Member‏‎ (8 categories)
  60. Hennepin Member‏‎ (8 categories)
  61. Arsenal Member‏‎ (8 categories)
  62. Decorah Subgroup‏‎ (8 categories)
  63. Elgin Shale Member‏‎ (8 categories)
  64. Nutwood Shale Member‏‎ (8 categories)
  65. Oglesby Member‏‎ (8 categories)
  66. Blodgett Member‏‎ (8 categories)
  67. Cave Hill Shale Member‏‎ (8 categories)
  68. Sharpsboro Member‏‎ (8 categories)
  69. St. Peter Sandstone‏‎ (8 categories)
  70. Allard Limestone Member‏‎ (8 categories)
  71. Kingdom Sandstone Member‏‎ (8 categories)
  72. Cypress Sandstone‏‎ (8 categories)
  73. Dutchtown Limestone‏‎ (8 categories)
  74. Hardinsburg Sandstone‏‎ (8 categories)
  75. Pecatonica Formation‏‎ (8 categories)
  76. Joachim Dolomite‏‎ (8 categories)
  77. Defiance Member‏‎ (8 categories)
  78. Thebes Sandstone Member‏‎ (8 categories)
  79. Popcorn Sandstone Member‏‎ (8 categories)
  80. Rosiclare Sandstone Member‏‎ (8 categories)
  81. New Glarus Member‏‎ (8 categories)
  82. Scottsburg Limestone Member‏‎ (8 categories)
  83. Fredonia Limestone Member‏‎ (8 categories)
  84. Cedar Bluff Limestone Group‏‎ (8 categories)
  85. Starved Rock Sandstone Member‏‎ (8 categories)
  86. Dane Member‏‎ (8 categories)
  87. Metz Member‏‎ (8 categories)
  88. Glenwood Formation‏‎ (8 categories)
  89. Boles Member‏‎ (8 categories)
  90. Ford Station Limestone Member‏‎ (8 categories)
  91. Harmony Hill Shale Member‏‎ (8 categories)
  92. Matson Member‏‎ (8 categories)
  93. Plattin Subgroup‏‎ (8 categories)
  94. Ste. Genevieve Limestone‏‎ (8 categories)
  95. Augusta Member‏‎ (8 categories)
  96. Renault Limestone‏‎ (8 categories)
  97. Oneota Dolomite‏‎ (8 categories)
  98. Shetlerville Limestone Member‏‎ (8 categories)
  99. Aux Vases Sandstone‏‎ (8 categories)
  100. Tonti Sandstone Member‏‎ (8 categories)
  101. Dubuque Formation‏‎ (8 categories)
  102. Gordonville Member‏‎ (8 categories)
  103. Orchard Creek Shale Member‏‎ (8 categories)
  104. Chana Member‏‎ (8 categories)
  105. Medusa Member‏‎ (8 categories)
  106. Kress Member‏‎ (8 categories)
  107. Goreville Limestone Member‏‎ (8 categories)
  108. Karnak Limestone Member‏‎ (8 categories)
  109. Tygett Sandstone Member‏‎ (8 categories)
  110. Hannibal Shale‏‎ (8 categories)
  111. Bethel Sandstone‏‎ (8 categories)
  112. Levias Limestone Member‏‎ (8 categories)
  113. Nokomis Sandstone Member‏‎ (8 categories)
  114. Loughridge Sandstone Member‏‎ (8 categories)
  115. Cora Limestone Member‏‎ (8 categories)
  116. Yankeetown Sandstone‏‎ (8 categories)
  117. Kimmswick Subgroup‏‎ (8 categories)
  118. Lacey Member‏‎ (7 categories)
  119. Shumway Limestone Member‏‎ (7 categories)
  120. Stonefort Limestone Member‏‎ (7 categories)
  121. West Franklin Limestone Member‏‎ (7 categories)
  122. Pounds Sandstone Member‏‎ (7 categories)
  123. Ramp Creek Limestone Member‏‎ (7 categories)
  124. Clermont Shale Member‏‎ (7 categories)
  125. Saverton Shale‏‎ (7 categories)
  126. De Long Coal Member‏‎ (7 categories)
  127. Francis Creek Shale Member‏‎ (7 categories)
  128. Vergennes Sandstone Member‏‎ (7 categories)
  129. Louisiana Limestone‏‎ (7 categories)
  130. Shakopee Dolomite‏‎ (7 categories)
  131. Howardton Limestone Member‏‎ (7 categories)
  132. Brereton Limestone Member‏‎ (7 categories)
  133. Pokeberry Limestone Member‏‎ (7 categories)
  134. Charter Member‏‎ (7 categories)
  135. Macoupin Limestone Member‏‎ (7 categories)
  136. Curlew Limestone Member‏‎ (7 categories)
  137. Merom Sandstone Member‏‎ (7 categories)
  138. Dutch Creek Sandstone Member‏‎ (7 categories)
  139. Finnie Sandstone Member‏‎ (7 categories)
  140. Ullin Limestone‏‎ (7 categories)
  141. Jamestown Coal Member‏‎ (7 categories)
  142. Buelter Member‏‎ (7 categories)
  143. Prairie du Chien Group‏‎ (7 categories)
  144. Clore Formation‏‎ (7 categories)
  145. Scales Shale‏‎ (7 categories)
  146. Spar Mountain Sandstone Member‏‎ (7 categories)
  147. Franconia Formation‏‎ (7 categories)
  148. Granger Sandstone Member‏‎ (7 categories)
  149. Bankston Fork Limestone Member‏‎ (7 categories)
  150. Dix Limestone Member‏‎ (7 categories)
  151. Tripp Limestone Member‏‎ (7 categories)
  152. Wapsipinicon Limestone‏‎ (7 categories)
  153. Gunn Member‏‎ (7 categories)
  154. Pond Creek Coal Member‏‎ (7 categories)
  155. New Burnside Coal Member‏‎ (7 categories)
  156. Flannigan Coal Member‏‎ (7 categories)
  157. Bidwell Coal Member‏‎ (7 categories)
  158. Bunje Limestone Member‏‎ (7 categories)
  159. Coffeen Limestone Member‏‎ (7 categories)
  160. Marywood Member‏‎ (7 categories)
  161. O'Nan Coal Member‏‎ (7 categories)
  162. Grassy Creek Shale‏‎ (7 categories)
  163. Hermon Coal Member‏‎ (7 categories)
  164. Kenyon Member‏‎ (7 categories)
  165. Lovell Member‏‎ (7 categories)
  166. Starrs Cave Limestone‏‎ (7 categories)
  167. Mt. Carmel Sandstone Member‏‎ (7 categories)
  168. Geneva Dolomite Member‏‎ (7 categories)
  169. Allenby Coal Member‏‎ (7 categories)
  170. Gunter Sandstone‏‎ (7 categories)
  171. Lake Creek Coal Member‏‎ (7 categories)
  172. Cheltenham Clay Member‏‎ (7 categories)
  173. Flat Creek Coal Member‏‎ (7 categories)
  174. Assumption Coal Member‏‎ (7 categories)
  175. Reel Limestone Member‏‎ (7 categories)
  176. Degonia Sandstone‏‎ (7 categories)
  177. Modesto Formation‏‎ (7 categories)
  178. Elmhurst Sandstone Member‏‎ (7 categories)
  179. Vienna Limestone‏‎ (7 categories)
  180. Okaw Group‏‎ (7 categories)
  181. Bogota Limestone Member‏‎ (7 categories)
  182. Keokuk Limestone‏‎ (7 categories)
  183. Mt. Rorah Coal Member‏‎ (7 categories)
  184. Trivoli Sandstone Member‏‎ (7 categories)
  185. Inglefield Sandstone Member‏‎ (7 categories)
  186. Pope Creek Coal Member‏‎ (7 categories)
  187. Kinkaid Limestone‏‎ (7 categories)
  188. New Haven Coal Member‏‎ (7 categories)
  189. Athensville Coal Member‏‎ (7 categories)
  190. Joppa Member‏‎ (7 categories)
  191. Burroughs Limestone Member‏‎ (7 categories)
  192. Proviso Siltstone Member‏‎ (7 categories)
  193. Litchfield Coal Member‏‎ (7 categories)
  194. Cohn Coal Member‏‎ (7 categories)
  195. Scottville Limestone Member‏‎ (7 categories)
  196. Momence Sandstone Member‏‎ (7 categories)
  197. Tioga Bentonite Bed‏‎ (7 categories)
  198. Friendsville Coal Member‏‎ (7 categories)
  199. Wise Ridge Coal Member‏‎ (7 categories)
  200. Omega Limestone Member‏‎ (7 categories)
  201. Platteville Group‏‎ (7 categories)
  202. Cedar Valley Limestone‏‎ (7 categories)
  203. Cramer Limestone Member‏‎ (7 categories)
  204. Shelbyville Coal Member‏‎ (7 categories)
  205. Mt. Simon Sandstone‏‎ (7 categories)
  206. Gentry Coal Bed‏‎ (7 categories)
  207. Paint Creek Group‏‎ (7 categories)
  208. Ironton Sandstone‏‎ (7 categories)
  209. Salem Limestone‏‎ (7 categories)
  210. Danville Coal Member‏‎ (7 categories)
  211. Golconda Group‏‎ (7 categories)
  212. Reisner Limestone Member‏‎ (7 categories)
  213. Seahorne Limestone Member‏‎ (7 categories)
  214. Witt Coal Member‏‎ (7 categories)
  215. Carlinville Limestone Member‏‎ (7 categories)
  216. Crane Member‏‎ (7 categories)
  217. McWain Sandstone Member‏‎ (7 categories)
  218. Trowbridge Coal Member‏‎ (7 categories)
  219. Gila Limestone Member‏‎ (7 categories)
  220. Ancell Group‏‎ (7 categories)
  221. Manley Coal Member‏‎ (7 categories)
  222. Sweetland Creek Shale‏‎ (7 categories)
  223. New Richmond Sandstone‏‎ (7 categories)
  224. Harrodsburg Limestone Member‏‎ (7 categories)
  225. Little Vermilion Limestone Member‏‎ (7 categories)
  226. Mooseheart Member‏‎ (7 categories)
  227. Walche Limestone Member‏‎ (7 categories)
  228. Greenup Limestone Member‏‎ (7 categories)
  229. Bonpas Limestone Member‏‎ (7 categories)
  230. Creal Springs Limestone Member‏‎ (7 categories)
  231. Murphysboro Coal Member‏‎ (7 categories)
  232. Exline Limestone Member‏‎ (7 categories)
  233. Gimlet Sandstone Member‏‎ (7 categories)
  234. Lawson Shale Member‏‎ (7 categories)
  235. Millersville Limestone Member‏‎ (7 categories)
  236. Eau Claire Formation‏‎ (7 categories)
  237. Sylamore Sandstone‏‎ (7 categories)
  238. Fort Atkinson Limstone‏‎ (7 categories)
  239. Calhoun Coal Member‏‎ (7 categories)
  240. Livingston Limestone Member‏‎ (7 categories)
  241. Conant Limestone Member‏‎ (7 categories)
  242. Mayfield Member‏‎ (7 categories)
  243. Delwood Coal Member‏‎ (7 categories)
  244. Springville Shale‏‎ (7 categories)
  245. Eminence Formation‏‎ (7 categories)
  246. Galena Group‏‎ (7 categories)
  247. Battery Rock Sandstone Member‏‎ (7 categories)
  248. Womac Coal Member‏‎ (7 categories)
  249. Opdyke Coal Member‏‎ (7 categories)
  250. Hoing Sandstone Member‏‎ (7 categories)
  251. Shoal Creek Limestone Member‏‎ (7 categories)
  252. Murray Bluff Sandstone Member‏‎ (7 categories)
  253. Girardeau Limestone‏‎ (7 categories)
  254. Hall Limestone Member‏‎ (7 categories)
  255. Bernadotte Sandstone Member‏‎ (7 categories)
  256. Palestine Sandstone‏‎ (7 categories)
  257. Brush Coal Member‏‎ (7 categories)
  258. Davis Member‏‎ (7 categories)
  259. Tar Springs Sandstone‏‎ (7 categories)
  260. Willis Coal Member‏‎ (7 categories)
  261. Rendleman Oolite Bed‏‎ (7 categories)
  262. Lombard Dolomite Member‏‎ (7 categories)
  263. Cooper Limestone Member‏‎ (7 categories)
  264. Sellers Limestone Bed‏‎ (7 categories)
  265. Grindstaff Sandstone Member‏‎ (7 categories)
  266. Woodbury Limestone Member‏‎ (7 categories)
  267. Brainard Shale‏‎ (7 categories)
  268. Rock Branch Coal Member‏‎ (7 categories)
  269. Sorento Limestone Member‏‎ (7 categories)
  270. Tarter Coal Member‏‎ (7 categories)
  271. Noix Oolite Member‏‎ (7 categories)
  272. Fox Valley Member‏‎ (7 categories)
  273. Babylon Sandstone Member‏‎ (7 categories)
  274. Reynoldsburg Coal Member‏‎ (7 categories)
  275. Lonsdale Limestone Member‏‎ (7 categories)
  276. Copperas Creek Sandstone Member‏‎ (7 categories)
  277. Seville Limestone Member‏‎ (7 categories)
  278. McClearys Bluff Coal Member‏‎ (7 categories)
  279. Derby-Doerun Member‏‎ (7 categories)
  280. Galum Limestone Member‏‎ (7 categories)
  281. Walnut Grove Limestone Member‏‎ (7 categories)
  282. Grove Church Shale‏‎ (7 categories)
  283. Chapel Coal Member‏‎ (7 categories)
  284. Rock Island Coal Member‏‎ (7 categories)
  285. Menard Limestone‏‎ (7 categories)
  286. Farmington Shale Member‏‎ (7 categories)
  287. Glen Dean Limestone‏‎ (7 categories)
  288. West Baden Group‏‎ (7 categories)
  289. La Salle Limestone Member‏‎ (7 categories)
  290. De Graff Coal Member‏‎ (7 categories)
  291. Effingham Limestone Member‏‎ (7 categories)
  292. Piasa Limestone‏‎ (7 categories)
  293. Romeo Member‏‎ (6 categories)
  294. Glen Park Formation‏‎ (6 categories)
  295. Hanover Limestone Member‏‎ (6 categories)
  296. North Hill Group‏‎ (6 categories)
  297. Grand Tower Limestone‏‎ (6 categories)
  298. Bailey Limestone‏‎ (6 categories)
  299. Canton Shale Member‏‎ (6 categories)
  300. Coralville Member‏‎ (6 categories)
  301. St. Louis Limestone‏‎ (6 categories)
  302. Gasperian Stage‏‎ (6 categories)
  303. Waltersburg Formation‏‎ (6 categories)
  304. Otis Member‏‎ (6 categories)
  305. Roodhouse coal bed‏‎ (6 categories)
  306. New Albany Shale Group‏‎ (6 categories)
  307. Bevier Coal Member or Bed‏‎ (6 categories)
  308. Rapid Member‏‎ (6 categories)
  309. Vermilionville Sandstone Member‏‎ (6 categories)
  310. Kenwood Member‏‎ (6 categories)
  311. McCraney Limestone‏‎ (6 categories)
  312. Mounds Gravel‏‎ (6 categories)
  313. Ottawa Limestone Megagroup‏‎ (6 categories)
  314. Briar Hill Coal Member‏‎ (6 categories)
  315. Chazyan Stage‏‎ (6 categories)
  316. Schweizer Member‏‎ (6 categories)
  317. Franconian Stage‏‎ (6 categories)
  318. Plaines Member‏‎ (6 categories)
  319. Covel Conglomerate Bed‏‎ (6 categories)
  320. Dykersburg Shale Member‏‎ (6 categories)
  321. Wheeler Coal Member or Bed‏‎ (6 categories)
  322. Joliet Formation‏‎ (6 categories)
  323. Burlington Limestone‏‎ (6 categories)
  324. Prospect Hill Siltstone‏‎ (6 categories)
  325. Lingle Formation‏‎ (6 categories)
  326. Coggan Member‏‎ (6 categories)
  327. Spoon Formation‏‎ (6 categories)
  328. Oak Grove Limestone Member‏‎ (6 categories)
  329. Grassy Knob Chert‏‎ (6 categories)
  330. Herrin Coal Member‏‎ (6 categories)
  331. Coxville Sandstone Member‏‎ (6 categories)
  332. Genevievian Stage‏‎ (6 categories)
  333. Warsaw Shale‏‎ (6 categories)
  334. Survant Coal Member‏‎ (6 categories)
  335. Dekoven Coal Member‏‎ (6 categories)
  336. Spring Grove Member‏‎ (6 categories)
  337. Elviran Stage‏‎ (6 categories)
  338. Kerton Creek coal bed‏‎ (6 categories)
  339. Cardiff coal bed‏‎ (6 categories)
  340. McNairy Formation‏‎ (6 categories)
  341. State Pond Member‏‎ (6 categories)
  342. Everton Dolomite‏‎ (6 categories)
  343. Troutman Member‏‎ (6 categories)
  344. Purington Shale Member‏‎ (6 categories)
  345. Colchester Coal Member‏‎ (6 categories)
  346. Montrose Chert Member‏‎ (6 categories)
  347. Elwood Formation‏‎ (6 categories)
  348. Fults Member‏‎ (6 categories)
  349. Abbott Formation‏‎ (6 categories)
  350. Greenbush Coal Member‏‎ (6 categories)
  351. Bond Formation‏‎ (6 categories)
  352. Drummond Member‏‎ (6 categories)
  353. Excello Shale Member‏‎ (6 categories)
  354. Davenport Member‏‎ (6 categories)
  355. Solon Member‏‎ (6 categories)
  356. Wilhelmi Formation‏‎ (6 categories)
  357. Big Creek Shale Member‏‎ (6 categories)
  358. Percy Limestone Member‏‎ (6 categories)
  359. Jordan Sandstone‏‎ (6 categories)
  360. Mattoon Formation‏‎ (6 categories)
  361. Springfield Coal Member‏‎ (6 categories)
  362. Chalfin Member‏‎ (6 categories)
  363. Turner Mine Shale Member‏‎ (6 categories)
  364. Anna Shale Member‏‎ (6 categories)
  365. Wayside Member‏‎ (6 categories)
  366. Isabel Sandstone Member‏‎ (6 categories)
  367. Davis Coal Member‏‎ (6 categories)
  368. Will Scarlet Shale Member‏‎ (6 categories)
  369. Bilyeu Member‏‎ (6 categories)
  370. Seelyville Coal Member‏‎ (6 categories)
  371. Offerman Member‏‎ (6 categories)
  372. Abingdon Coal Member‏‎ (6 categories)
  373. Borden Siltstone‏‎ (6 categories)
  374. Rocher Member‏‎ (6 categories)
  375. Mecca Quarry Shale Member‏‎ (6 categories)
  376. Antioch Limestone Member‏‎ (6 categories)
  377. Potosi Dolomite‏‎ (6 categories)
  378. Knox Dolomite Megagroup‏‎ (6 categories)
  379. Maquoketa Shale Group‏‎ (6 categories)
  380. Birds Member‏‎ (6 categories)
  381. Kankakee Formation‏‎ (6 categories)
  382. St. Clair Limestone‏‎ (6 categories)
  383. Energy Shale Member‏‎ (6 categories)
  384. Galesville Sandstone‏‎ (6 categories)
  385. Pleasantview Sandstone Member‏‎ (6 categories)
  386. Kidd Member‏‎ (6 categories)
  387. Potsdam Sandstone Megagroup‏‎ (6 categories)
  388. Clear Creek Chert‏‎ (6 categories)
  389. Marcus Formation‏‎ (6 categories)
  390. Misenheimer Shale Member‏‎ (6 categories)
  391. Edgewood Formation‏‎ (6 categories)
  392. St. David Limestone Member‏‎ (6 categories)
  393. Trempealeauan Stage‏‎ (6 categories)
  394. Hombergian Stage‏‎ (6 categories)
  395. Brandon Bridge Member‏‎ (6 categories)
  396. Neda Formation‏‎ (6 categories)
  397. Anvil Rock Sandstone Member‏‎ (6 categories)
  398. Markgraf Member‏‎ (6 categories)
  399. Backbone Limestone‏‎ (6 categories)
  400. Blanding Formation‏‎ (6 categories)
  401. Sexton Creek Limestone‏‎ (6 categories)
  402. Grover Gravel‏‎ (6 categories)
  403. Houchin Creek Coal Member‏‎ (6 categories)
  404. Breezy Hill Limestone Member‏‎ (6 categories)
  405. Caseyville Formation‏‎ (6 categories)
  406. Meppen Limestone‏‎ (5 categories)
  407. Fern Glen Formation‏‎ (5 categories)
  408. Beverly Tongue‏‎ (5 categories)
  409. Levings Member‏‎ (5 categories)
  410. Missourian Series‏‎ (5 categories)
  411. Blocher Shale‏‎ (5 categories)
  412. Piatt Member‏‎ (5 categories)
  413. Richmondian Stage‏‎ (5 categories)
  414. Mosalem Formation‏‎ (5 categories)
  415. Equality Formation‏‎ (5 categories)
  416. Trentonian Stage‏‎ (5 categories)
  417. Alexandrian Series‏‎ (5 categories)
  418. Moccasin Springs Formation‏‎ (5 categories)
  419. Tete de Morts Formation‏‎ (5 categories)
  420. Henry Formation‏‎ (5 categories)
  421. Cape Limestone‏‎ (5 categories)
  422. Yorkville Member‏‎ (5 categories)
  423. Lagonda Member‏‎ (5 categories)
  424. Sugar Run Formation‏‎ (5 categories)
  425. Unnamed clastic member - Carbondale Formation‏‎ (5 categories)
  426. Ashmore Tongue‏‎ (5 categories)
  427. Owl Creek Formation‏‎ (5 categories)
  428. Unnamed gray shale member - Carbondale Formation‏‎ (5 categories)
  429. Peddicord Tongue‏‎ (5 categories)
  430. Carbondale Formation‏‎ (5 categories)
  431. Alto Formation‏‎ (5 categories)
  432. Chesterian Series‏‎ (5 categories)
  433. Roxana Silt‏‎ (5 categories)
  434. Mammoth Cave Limestone Megagroup‏‎ (5 categories)
  435. Upper Devonian Series‏‎ (5 categories)
  436. Wilcox Formation‏‎ (5 categories)
  437. Virgilian Series‏‎ (5 categories)
  438. Robein Member‏‎ (5 categories)
  439. Hadley Gravel Member‏‎ (5 categories)
  440. Chouteau Limestone‏‎ (5 categories)
  441. Manitowoc Member‏‎ (5 categories)
  442. Sweeney Formation‏‎ (5 categories)
  443. Atokan Series‏‎ (5 categories)
  444. Delafield Member‏‎ (5 categories)
  445. Tippecanoe Sequence‏‎ (5 categories)
  446. Wadsworth Formation‏‎ (5 categories)
  447. Kewanee Group‏‎ (5 categories)
  448. Haeger Member‏‎ (5 categories)
  449. Porters Creek Formation‏‎ (5 categories)
  450. Kiser Creek Member‏‎ (5 categories)
  451. Lake Michigan Member‏‎ (5 categories)
  452. Delavan Member‏‎ (5 categories)
  453. Tiskilwa Formation‏‎ (5 categories)
  454. Galatia Member‏‎ (5 categories)
  455. Batestown Member‏‎ (5 categories)
  456. Kewaunee Formation‏‎ (5 categories)
  457. Post Creek Formation‏‎ (5 categories)
  458. Knobs Megagroup‏‎ (5 categories)
  459. Clayton Formation‏‎ (5 categories)
  460. Sonora Formation‏‎ (5 categories)
  461. Edenian Stage‏‎ (5 categories)
  462. Niagaran Series‏‎ (5 categories)
  463. Fort Payne Formation‏‎ (5 categories)
  464. Valmeyeran Series‏‎ (5 categories)
  465. Maysvillian Stage‏‎ (5 categories)
  466. Morrowan Series‏‎ (5 categories)
  467. Baylis Formation‏‎ (5 categories)
  468. Shorewood Member‏‎ (5 categories)
  469. Two Rivers Member‏‎ (5 categories)
  470. Racine Formation‏‎ (5 categories)
  471. Lemont Formation‏‎ (5 categories)
  472. Blackriveran Stage‏‎ (5 categories)
  473. Kaskaskia Sequence‏‎ (5 categories)
  474. Morton Tongue‏‎ (5 categories)
  475. Walshville Member‏‎ (5 categories)
  476. Chapin Soil‏‎ (4 categories)
  477. Argyle Till Member‏‎ (4 categories)
  478. Markham Silt Member‏‎ (4 categories)
  479. Winnebago Formation‏‎ (4 categories)
  480. Ogle Till Member‏‎ (4 categories)
  481. Kellerville Till Member‏‎ (4 categories)
  482. Gulfian Series‏‎ (4 categories)
  483. Yarmouth Soil‏‎ (4 categories)
  484. Kinderhookian Series‏‎ (4 categories)
  485. West Lebanon Formation‏‎ (4 categories)
  486. Pearl Formation‏‎ (4 categories)
  487. Lierle Clay Member‏‎ (4 categories)
  488. Pike Soil‏‎ (4 categories)
  489. Loveland Silt‏‎ (4 categories)
  490. Hulick Till Member‏‎ (4 categories)
  491. Mahomet Sand Member‏‎ (4 categories)
  492. Banner Formation‏‎ (4 categories)
  493. Winslow Till Member‏‎ (4 categories)
  494. Capron Till Member‏‎ (4 categories)
  495. Cayugan Series‏‎ (4 categories)
  496. McDonough Loess Member‏‎ (4 categories)
  497. Belgium Member‏‎ (4 categories)
  498. Hunton Limestone Megagroup‏‎ (4 categories)
  499. Harkness Silt Member‏‎ (4 categories)
  500. Mascoutah facies‏‎ (4 categories)

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