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

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