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

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