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

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