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  1. Paleozoic Erathem‏‎ (926 links)
  2. Pennsylvanian Subsystem‏‎ (322 links)
  3. Absaroka Sequence‏‎ (318 links)
  4. Tippecanoe Sequence‏‎ (283 links)
  5. Kaskaskia Sequence‏‎ (251 links)
  6. Ordovician System‏‎ (232 links)
  7. Cenozoic Erathem‏‎ (230 links)
  8. Quaternary System‏‎ (214 links)
  9. Pleistocene Series‏‎ (189 links)
  10. Mississippian Subsystem‏‎ (182 links)
  11. Champlainian Series‏‎ (182 links)
  12. Desmoinesian Series‏‎ (180 links)
  13. Ottawa Limestone Megagroup‏‎ (174 links)
  14. Kewanee Group‏‎ (150 links)
  15. McLeansboro Group‏‎ (129 links)
  16. Hunton Limestone Megagroup‏‎ (124 links)
  17. Blackriveran Stage‏‎ (117 links)
  18. Pope Megagroup‏‎ (105 links)
  19. Carbondale Formation‏‎ (91 links)
  20. Sauk Sequence‏‎ (89 links)
  21. Chesterian Series‏‎ (89 links)
  22. Devonian System‏‎ (84 links)
  23. Missourian Series‏‎ (83 links)
  24. Valmeyeran Series‏‎ (80 links)
  25. Mammoth Cave Limestone Megagroup‏‎ (77 links)
  26. Spoon Formation‏‎ (73 links)
  27. Platteville Group‏‎ (73 links)
  28. Cambrian System‏‎ (73 links)
  29. Galena Group‏‎ (71 links)
  30. Knox Dolomite Megagroup‏‎ (71 links)
  31. Croixan Series‏‎ (69 links)
  32. Trentonian Stage‏‎ (69 links)
  33. Silurian System‏‎ (68 links)
  34. Plattin Subgroup‏‎ (58 links)
  35. Modesto Formation‏‎ (57 links)
  36. Middle Devonian Series‏‎ (57 links)
  37. Ancell Group‏‎ (53 links)
  38. Elviran Stage‏‎ (48 links)
  39. Kimmswick Subgroup‏‎ (48 links)
  40. Mattoon Formation‏‎ (48 links)
  41. Galatia Channel:Introduction‏‎ (46 links)
  42. Galatia Channel:Channels and Cyclothems: A Summary Model‏‎ (46 links)
  43. Galatia Channel:Evolution of a Peat - Contemporaneous Channel - The Galatia Channel, Middle Pennsylvanian, of the Illinois Basin‏‎ (46 links)
  44. Galatia Channel:Conclusions‏‎ (45 links)
  45. Galatia Channel:Figures‏‎ (45 links)
  46. Galatia Channel:Similar Channels Affecting Other Coal Seams‏‎ (45 links)
  47. Galatia Channel:Underclay of Springfield Coal‏‎ (45 links)
  48. Galatia Channel:Galatia Member‏‎ (45 links)
  49. Galatia Channel:Springfield Coal‏‎ (45 links)
  50. Galatia Channel:References‏‎ (45 links)
  51. Galatia Channel:Delafield Member‏‎ (45 links)
  52. Galatia Channel:Hanover Limestone Member‏‎ (45 links)
  53. Galatia Channel:St. David Limestone Member‏‎ (45 links)
  54. Galatia Channel:Acknowledgments‏‎ (45 links)
  55. Galatia Channel:Discussion‏‎ (45 links)
  56. Galatia Channel:Other Channels Related to the Galatia Channel‏‎ (45 links)
  57. Galatia Channel:Stratigraphy‏‎ (45 links)
  58. Galatia Channel:Appendix‏‎ (45 links)
  59. Galatia Channel:Dykersburg (Shale) Member‏‎ (45 links)
  60. Galatia Channel:Houchin Creek Coal‏‎ (45 links)
  61. Galatia Channel:Plates‏‎ (45 links)
  62. Galatia Channel:Summary‏‎ (45 links)
  63. Galatia Channel:Tables‏‎ (45 links)
  64. Galatia Channel:Excello Shale Member‏‎ (45 links)
  65. Galatia Channel:Turner Mine Shale Member‏‎ (45 links)
  66. McCormick Group‏‎ (44 links)
  67. Alexandrian Series‏‎ (43 links)
  68. Abbott Formation‏‎ (41 links)
  69. Embayment Megagroup‏‎ (41 links)
  70. Dresbachian Stage‏‎ (40 links)
  71. Glasford Formation‏‎ (39 links)
  72. Dunleith Formation‏‎ (39 links)
  73. Bond Formation‏‎ (39 links)
  74. Gasperian Stage‏‎ (38 links)
  75. Cincinnatian Series‏‎ (38 links)
  76. Wedron Group‏‎ (37 links)
  77. Holocene Series‏‎ (37 links)
  78. Knobs Megagroup‏‎ (35 links)
  79. Atokan Series‏‎ (35 links)
  80. New Albany Shale Group‏‎ (34 links)
  81. Trempealeauan Stage‏‎ (34 links)
  82. Galatia Channel:Model of Channel Development‏‎ (32 links)
  83. Galatia Channel:Danville Coal‏‎ (32 links)
  84. Galatia Channel:Murphysboro Coal and Oraville Channel‏‎ (32 links)
  85. Galatia Channel:Other Channels‏‎ (32 links)
  86. Galatia Channel:Herrin Coal, Energy Shale, and Walshville Channel‏‎ (32 links)
  87. Galatia Channel:Peat Developed at Lowstand‏‎ (32 links)
  88. Galatia Channel:Sullivan Channel‏‎ (32 links)
  89. Galatia Channel:Baker Coal and Winslow-Henderson Channel‏‎ (32 links)
  90. Galatia Channel:Effingham Channel‏‎ (32 links)
  91. Decorah Subgroup‏‎ (32 links)
  92. Galatia Channel:Leslie Cemetery Channel‏‎ (32 links)
  93. Galatia Channel:Rapid Transgression, Gradual Regression‏‎ (32 links)
  94. Galatia Channel:Colchester Coal and Francis Creek Shale‏‎ (32 links)
  95. Galatia Channel:Linkage of Climate and Eustasy‏‎ (32 links)
  96. Galatia Channel:Relationship of Effingham and Galatia Channels‏‎ (32 links)
  97. Banner Formation‏‎ (31 links)
  98. Mason Group‏‎ (31 links)
  99. Maquoketa Shale Group‏‎ (30 links)
  100. Caseyville Formation‏‎ (30 links)
  101. Grand Detour Formation‏‎ (29 links)
  102. Niagaran Series‏‎ (29 links)
  103. Morrowan Series‏‎ (29 links)
  104. Franconian Stage‏‎ (28 links)
  105. Potsdam Sandstone Megagroup‏‎ (28 links)
  106. Cedar Bluff Limestone Group‏‎ (27 links)
  107. Mt. Simon Sandstone‏‎ (27 links)
  108. Virgilian Series‏‎ (27 links)
  109. Mesozoic Erathem‏‎ (27 links)
  110. Kinderhookian Series‏‎ (26 links)
  111. Joachim Dolomite‏‎ (26 links)
  112. Genevievian Stage‏‎ (26 links)
  113. Cretaceous System‏‎ (26 links)
  114. Pecatonica Formation‏‎ (26 links)
  115. Prairie du Chien Group‏‎ (25 links)
  116. Mifflin Formation‏‎ (25 links)
  117. Lingle Formation‏‎ (25 links)
  118. Okaw Group‏‎ (25 links)
  119. Paint Creek Group‏‎ (25 links)
  120. Glenwood Formation‏‎ (24 links)
  121. West Baden Group‏‎ (24 links)
  122. Gulfian Series‏‎ (24 links)
  123. Canadian Series‏‎ (23 links)
  124. Ste. Genevieve Limestone‏‎ (23 links)
  125. Lake Michigan Formation‏‎ (23 links)
  126. Wapsipinicon Limestone‏‎ (23 links)
  127. Renault Limestone‏‎ (23 links)
  128. Tertiary System‏‎ (23 links)
  129. Upper Devonian Series‏‎ (23 links)
  130. Hombergian Stage‏‎ (22 links)
  131. Grand Tower Limestone‏‎ (22 links)
  132. Henry Formation‏‎ (22 links)
  133. Ridenhower Formation‏‎ (22 links)
  134. Ironton Sandstone‏‎ (21 links)
  135. Cedar Valley Limestone‏‎ (21 links)
  136. Maysvillian Stage‏‎ (21 links)
  137. Nachusa Formation‏‎ (21 links)
  138. Scales Shale‏‎ (21 links)
  139. Equality Formation‏‎ (21 links)
  140. Quimbys Mill Formation‏‎ (21 links)
  141. Golconda Group‏‎ (21 links)
  142. Salem Limestone‏‎ (21 links)
  143. Roxana Silt‏‎ (20 links)
  144. Kankakee Formation‏‎ (20 links)
  145. St. Peter Sandstone‏‎ (20 links)
  146. Kings Lake Formation‏‎ (19 links)
  147. Aux Vases Sandstone‏‎ (19 links)
  148. Richmondian Stage‏‎ (19 links)
  149. Spechts Ferry Formation‏‎ (19 links)
  150. Clore Formation‏‎ (19 links)
  151. Fraileys Shale‏‎ (19 links)
  152. Eau Claire Formation‏‎ (19 links)
  153. Kinkaid Limestone‏‎ (19 links)
  154. Menard Limestone‏‎ (19 links)
  155. Wise Lake Formation‏‎ (19 links)
  156. Big Clifty Sandstone Member‏‎ (19 links)
  157. Battery Rock Sandstone Member‏‎ (19 links)
  158. Lemont Formation‏‎ (19 links)
  159. Ullin Limestone‏‎ (19 links)
  160. Guttenberg Formation‏‎ (19 links)
  161. Oneota Dolomite‏‎ (18 links)
  162. Dutchtown Limestone‏‎ (18 links)
  163. Pounds Sandstone Member‏‎ (18 links)
  164. Tiskilwa Formation‏‎ (18 links)
  165. North Hill Group‏‎ (18 links)
  166. Kewaunee Formation‏‎ (18 links)
  167. Joliet Formation‏‎ (18 links)
  168. Franconia Formation‏‎ (17 links)
  169. Lower Devonian Series‏‎ (17 links)
  170. Winnebago Formation‏‎ (17 links)
  171. Haney Limestone‏‎ (17 links)
  172. Karnak Limestone Member‏‎ (17 links)
  173. Lake Michigan Member‏‎ (17 links)
  174. Downeys Bluff Limestone‏‎ (17 links)
  175. Yankeetown Sandstone‏‎ (16 links)
  176. Borden Siltstone‏‎ (16 links)
  177. Wilhelmi Formation‏‎ (16 links)
  178. Hannibal Shale‏‎ (16 links)
  179. Fredonia Limestone Member‏‎ (16 links)
  180. Spar Mountain Sandstone Member‏‎ (16 links)
  181. Beech Creek Limestone‏‎ (16 links)
  182. Elm Member‏‎ (15 links)
  183. Fairplay Member‏‎ (15 links)
  184. Wall Member‏‎ (15 links)
  185. Beecher Member‏‎ (15 links)
  186. New London Member‏‎ (15 links)
  187. Mounds Gravel‏‎ (15 links)
  188. Rivoli Member‏‎ (15 links)
  189. Sample Sandstone Member‏‎ (15 links)
  190. Cypress Sandstone‏‎ (15 links)
  191. Hazel Green Member‏‎ (15 links)
  192. Springville Shale‏‎ (15 links)
  193. Trivoli Sandstone Member‏‎ (15 links)
  194. Mincke Member‏‎ (15 links)
  195. Paleocene Series‏‎ (15 links)
  196. Peoria Silt‏‎ (15 links)
  197. Pearl Formation‏‎ (15 links)
  198. Clement Member‏‎ (15 links)
  199. Shullsburg Member‏‎ (15 links)
  200. Garnavillo Member‏‎ (15 links)
  201. Hazelwood Member‏‎ (15 links)
  202. Pliocene Series‏‎ (15 links)
  203. Moredock Member‏‎ (15 links)
  204. Bethel Sandstone‏‎ (15 links)
  205. Buckhorn Member‏‎ (15 links)
  206. Reelsville Limestone Member‏‎ (15 links)
  207. Establishment Member‏‎ (15 links)
  208. Hely Member‏‎ (15 links)
  209. Stillman Member‏‎ (15 links)
  210. Victory Member‏‎ (15 links)
  211. Abernathy Member‏‎ (15 links)
  212. Blomeyer Member‏‎ (15 links)
  213. Sinsinawa Member‏‎ (15 links)
  214. Everett Member‏‎ (15 links)
  215. Francis Creek Shale Member‏‎ (15 links)
  216. Glencoe Member‏‎ (15 links)
  217. St. James Member‏‎ (15 links)
  218. Mortimer Member‏‎ (15 links)
  219. Dement Member‏‎ (15 links)
  220. Eagle Point Member‏‎ (15 links)
  221. Glenhaven Member‏‎ (15 links)
  222. Strawbridge Member‏‎ (15 links)
  223. Baylis Formation‏‎ (15 links)
  224. Castlewood Member‏‎ (15 links)
  225. Daysville Dolomite Member‏‎ (15 links)
  226. Herrin Coal Member‏‎ (15 links)
  227. Eminence Formation‏‎ (15 links)
  228. Keokuk Limestone‏‎ (15 links)
  229. Beaver Bend Limestone Member‏‎ (15 links)
  230. Brickeys Member‏‎ (15 links)
  231. Colchester Coal Member‏‎ (15 links)
  232. Eldena Member‏‎ (15 links)
  233. Forreston Member‏‎ (15 links)
  234. Walgreen Member‏‎ (15 links)
  235. Wyota Member‏‎ (15 links)
  236. Grover Gravel‏‎ (15 links)
  237. Briton Member‏‎ (15 links)
  238. Sherwood Member‏‎ (15 links)
  239. Goreville Limestone Member‏‎ (14 links)
  240. Levias Limestone Member‏‎ (14 links)
  241. Delavan Member‏‎ (14 links)
  242. Dane Member‏‎ (14 links)
  243. Defiance Member‏‎ (14 links)
  244. Dubuque Formation‏‎ (14 links)
  245. Kingdom Sandstone Member‏‎ (14 links)
  246. Matson Member‏‎ (14 links)
  247. Medusa Member‏‎ (14 links)
  248. Blodgett Member‏‎ (14 links)
  249. Oglesby Member‏‎ (14 links)
  250. Cora Limestone Member‏‎ (14 links)
  251. Arsenal Member‏‎ (14 links)
  252. Bailey Limestone‏‎ (14 links)
  253. McNairy Formation‏‎ (14 links)
  254. Negli Creek Limestone Member‏‎ (14 links)
  255. Chana Member‏‎ (14 links)
  256. Scottsburg Limestone Member‏‎ (14 links)
  257. Sharpsboro Member‏‎ (14 links)
  258. Grassy Knob Chert‏‎ (14 links)
  259. Hennepin Member‏‎ (14 links)
  260. Tygett Sandstone Member‏‎ (14 links)
  261. Nokomis Sandstone Member‏‎ (14 links)
  262. Davis Coal Member‏‎ (14 links)
  263. St. Louis Limestone‏‎ (14 links)
  264. Kress Member‏‎ (14 links)
  265. Tyson Member‏‎ (14 links)
  266. Elgin Shale Member‏‎ (14 links)
  267. Tuscaloosa Formation‏‎ (14 links)
  268. Boles Member‏‎ (14 links)
  269. Edgewood Formation‏‎ (14 links)
  270. Ford Station Limestone Member‏‎ (14 links)
  271. Hardinsburg Sandstone‏‎ (14 links)
  272. Orchard Creek Shale Member‏‎ (14 links)
  273. Metz Member‏‎ (14 links)
  274. Allard Limestone Member‏‎ (14 links)
  275. New Glarus Member‏‎ (14 links)
  276. Nutwood Shale Member‏‎ (14 links)
  277. Cave Hill Shale Member‏‎ (14 links)
  278. Rosiclare Sandstone Member‏‎ (14 links)
  279. Seelyville Coal Member‏‎ (14 links)
  280. Gordonville Member‏‎ (14 links)
  281. Harmony Hill Shale Member‏‎ (14 links)
  282. Starved Rock Sandstone Member‏‎ (14 links)
  283. Tonti Sandstone Member‏‎ (14 links)
  284. Loughridge Sandstone Member‏‎ (14 links)
  285. Chazyan Stage‏‎ (14 links)
  286. Thebes Sandstone Member‏‎ (14 links)
  287. Augusta Member‏‎ (14 links)
  288. Popcorn Sandstone Member‏‎ (14 links)
  289. Fort Atkinson Limstone‏‎ (13 links)
  290. Gimlet Sandstone Member‏‎ (13 links)
  291. Grove Church Shale‏‎ (13 links)
  292. Harrodsburg Limestone Member‏‎ (13 links)
  293. Lacey Member‏‎ (13 links)
  294. Springfield and Harrisburg Coal Members‏‎ (13 links)
  295. Joppa Member‏‎ (13 links)
  296. Tripp Limestone Member‏‎ (13 links)
  297. Lawson Shale Member‏‎ (13 links)
  298. Louisiana Limestone‏‎ (13 links)
  299. Wiley Coal Member‏‎ (13 links)
  300. McWain Sandstone Member‏‎ (13 links)
  301. Millersville Limestone Member‏‎ (13 links)
  302. Eocene Series‏‎ (13 links)
  303. Murphysboro Coal Member‏‎ (13 links)
  304. Oak Grove Limestone Member‏‎ (13 links)
  305. Palestine Sandstone‏‎ (13 links)
  306. Browning Sandstone Member‏‎ (13 links)
  307. Pope Creek Coal Member‏‎ (13 links)
  308. Canton Shale Member‏‎ (13 links)
  309. Batestown Member‏‎ (13 links)
  310. Cooper Limestone Member‏‎ (13 links)
  311. Seville Limestone Member‏‎ (13 links)
  312. Shoal Creek Limestone Member‏‎ (13 links)
  313. De Long Coal Member‏‎ (13 links)
  314. Farmington Shale Member‏‎ (13 links)
  315. Galum Limestone Member‏‎ (13 links)
  316. Girardeau Limestone‏‎ (13 links)
  317. Gunter Sandstone‏‎ (13 links)
  318. Lovell Member‏‎ (13 links)
  319. Sweetland Creek Shale‏‎ (13 links)
  320. Vergennes Sandstone Member‏‎ (13 links)
  321. Lowell Coal Member‏‎ (13 links)
  322. Walnut Grove Limestone Member‏‎ (13 links)
  323. Marywood Member‏‎ (13 links)
  324. Mecca Quarry Shale Member‏‎ (13 links)
  325. Anna Shale Member‏‎ (13 links)
  326. Mooseheart Member‏‎ (13 links)
  327. Babylon Sandstone Member‏‎ (13 links)
  328. Murray Bluff Sandstone Member‏‎ (13 links)
  329. Bernadotte Sandstone Member‏‎ (13 links)
  330. New Richmond Sandstone‏‎ (13 links)
  331. Brainard Shale‏‎ (13 links)
  332. Palzo Sandstone Member‏‎ (13 links)
  333. Brush Coal Member‏‎ (13 links)
  334. Reel Limestone Member‏‎ (13 links)
  335. Saverton Shale‏‎ (13 links)
  336. Copperas Creek Sandstone Member‏‎ (13 links)
  337. Fox Valley Member‏‎ (13 links)
  338. Glen Dean Limestone‏‎ (13 links)
  339. Granger Sandstone Member‏‎ (13 links)
  340. Hall Limestone Member‏‎ (13 links)
  341. Mayfield Member‏‎ (13 links)
  342. Sylamore Sandstone‏‎ (13 links)
  343. Vermilionville Sandstone Member‏‎ (13 links)
  344. Willis Coal Member‏‎ (13 links)
  345. Piasa Limestone‏‎ (13 links)
  346. Cardiff Coal Member‏‎ (13 links)
  347. Rock Branch Coal Member‏‎ (13 links)
  348. Shakopee Dolomite‏‎ (13 links)
  349. Danville Coal Member‏‎ (13 links)
  350. Shumway Limestone Member‏‎ (13 links)
  351. Degonia Sandstone‏‎ (13 links)
  352. Dutch Creek Sandstone Member‏‎ (13 links)
  353. Finnie Sandstone Member‏‎ (13 links)
  354. Grassy Creek Shale‏‎ (13 links)
  355. St. David Limestone Member‏‎ (13 links)
  356. Inglefield Sandstone Member‏‎ (13 links)
  357. Davis Member‏‎ (13 links)
  358. Tar Springs Sandstone‏‎ (13 links)
  359. Trowbridge Coal Member‏‎ (13 links)
  360. Litchfield Coal Member‏‎ (13 links)
  361. Wise Ridge Coal Member‏‎ (13 links)
  362. Bidwell Coal Member‏‎ (13 links)
  363. Noix Oolite Member‏‎ (13 links)
  364. Breezy Hill Limestone Member‏‎ (13 links)
  365. Buelter Member‏‎ (13 links)
  366. Carlinville Limestone Member‏‎ (13 links)
  367. Reisner Limestone Member‏‎ (13 links)
  368. Rock Island Coal Member‏‎ (13 links)
  369. Coffeen Limestone Member‏‎ (13 links)
  370. Delwood Coal Member‏‎ (13 links)
  371. Dykersburg Shale Member‏‎ (13 links)
  372. Flannigan Coal Member‏‎ (13 links)
  373. Geneva Dolomite Member‏‎ (13 links)
  374. Yorkville Member‏‎ (13 links)
  375. Charter Member‏‎ (13 links)
  376. Sorento Limestone Member‏‎ (13 links)
  377. Isabel Sandstone Member‏‎ (13 links)
  378. Derby-Doerun Member‏‎ (13 links)
  379. Stonefort Limestone Member‏‎ (13 links)
  380. Tarter Coal Member‏‎ (13 links)
  381. Little Vermilion Limestone Member‏‎ (13 links)
  382. Vienna Limestone‏‎ (13 links)
  383. Macoupin Limestone Member‏‎ (13 links)
  384. Clermont Shale Member‏‎ (13 links)
  385. Witt Coal Member‏‎ (13 links)
  386. Abingdon Coal Member‏‎ (13 links)
  387. Assumption Coal Member‏‎ (13 links)
  388. Bankston Fork Limestone Member‏‎ (13 links)
  389. Bogota Limestone Member‏‎ (13 links)
  390. Omega Limestone Member‏‎ (13 links)
  391. Brereton Limestone Member‏‎ (13 links)
  392. Pleasantview Sandstone Member‏‎ (13 links)
  393. Bunje Limestone Member‏‎ (13 links)
  394. Chapel Coal Member‏‎ (13 links)
  395. Scottville Limestone Member‏‎ (13 links)
  396. Covel Conglomerate Member‏‎ (13 links)
  397. Shawneetown Coal Member‏‎ (13 links)
  398. Peddicord Tongue‏‎ (13 links)
  399. Flat Creek Coal Member‏‎ (13 links)
  400. Greenbush Coal Member‏‎ (13 links)
  401. Hanover Limestone Member‏‎ (13 links)
  402. Crane Member‏‎ (13 links)
  403. Hermon Coal Member‏‎ (13 links)
  404. Elmhurst Sandstone Member‏‎ (13 links)
  405. Jake Creek Sandstone Member‏‎ (13 links)
  406. Livingston Limestone Member‏‎ (13 links)
  407. Womac Coal Member‏‎ (13 links)
  408. Merom Sandstone Member‏‎ (13 links)
  409. Moccasin Springs Formation‏‎ (13 links)
  410. Athensville Coal Member‏‎ (13 links)
  411. New Burnside Coal Member‏‎ (13 links)
  412. Big Creek Shale Member‏‎ (13 links)
  413. Opdyke Coal Member‏‎ (13 links)
  414. Briar Hill Coal Member‏‎ (13 links)
  415. Pokeberry Limestone Member‏‎ (13 links)
  416. Purington Shale Member‏‎ (13 links)
  417. Rendleman Oolite Bed‏‎ (13 links)
  418. Cheltenham Clay Member‏‎ (13 links)
  419. Roodhouse Coal Member‏‎ (13 links)
  420. Cohn Coal Member‏‎ (13 links)
  421. Seahorne Limestone Member‏‎ (13 links)
  422. Cramer Limestone Member‏‎ (13 links)
  423. Shelbyville Coal Member‏‎ (13 links)
  424. Dix Limestone Member‏‎ (13 links)
  425. Effingham Limestone Member‏‎ (13 links)
  426. Excello Shale Member‏‎ (13 links)
  427. Friendsville Coal Member‏‎ (13 links)
  428. Greenup Limestone Member‏‎ (13 links)
  429. Gunn Member‏‎ (13 links)
  430. Lombard Dolomite Member‏‎ (13 links)
  431. Starrs Cave Limestone‏‎ (13 links)
  432. Jamestown Coal Member‏‎ (13 links)
  433. Tioga Bentonite Bed‏‎ (13 links)
  434. La Salle Limestone Member‏‎ (13 links)
  435. Lonsdale Limestone Member‏‎ (13 links)
  436. Edenian Stage‏‎ (13 links)
  437. Walche Limestone Member‏‎ (13 links)
  438. Manley Coal Member‏‎ (13 links)
  439. Woodbury Limestone Member‏‎ (13 links)
  440. Mt. Carmel Sandstone Member‏‎ (13 links)
  441. Pond Creek Coal Member‏‎ (13 links)
  442. Burroughs Limestone Member‏‎ (13 links)
  443. Reynoldsburg Coal Member‏‎ (13 links)
  444. Creal Springs Limestone Member‏‎ (13 links)
  445. De Graff Coal Member‏‎ (13 links)
  446. Exline Limestone Member‏‎ (13 links)
  447. Gila Limestone Member‏‎ (13 links)
  448. Grindstaff Sandstone Member‏‎ (13 links)
  449. Kenyon Member‏‎ (13 links)
  450. Spring Lake Coal Member‏‎ (13 links)
  451. Hoing Sandstone Member‏‎ (13 links)
  452. Proviso Siltstone Member‏‎ (13 links)
  453. Summum Coal Member‏‎ (13 links)
  454. Lake Creek Coal Member‏‎ (13 links)
  455. West Franklin Limestone Member‏‎ (13 links)
  456. Allenby Coal Member‏‎ (13 links)
  457. Momence Sandstone Member‏‎ (13 links)
  458. Mt. Rorah Coal Member‏‎ (13 links)
  459. Raccoon Creek Group‏‎ (13 links)
  460. New Haven Coal Member‏‎ (13 links)
  461. Bonpas Limestone Member‏‎ (13 links)
  462. Calhoun Coal Member‏‎ (13 links)
  463. Ramp Creek Limestone Member‏‎ (13 links)
  464. Conant Limestone Member‏‎ (13 links)
  465. Curlew Limestone Member‏‎ (13 links)
  466. De Koven Coal Member‏‎ (13 links)
  467. Piatt Member‏‎ (12 links)
  468. Galesville Sandstone‏‎ (12 links)
  469. State Pond Member‏‎ (12 links)
  470. Kidd Member‏‎ (12 links)
  471. Markgraf Member‏‎ (12 links)
  472. Montrose Chert Member‏‎ (12 links)
  473. Blanding Formation‏‎ (12 links)
  474. Rapid Member‏‎ (12 links)
  475. Clear Creek Chert‏‎ (12 links)
  476. Manitowoc Member‏‎ (12 links)
  477. Howardton Limestone Member‏‎ (12 links)
  478. Jordan Sandstone‏‎ (12 links)
  479. Offerman Member‏‎ (12 links)
  480. Rocher Member‏‎ (12 links)
  481. Sexton Creek Limestone‏‎ (12 links)
  482. Elwood Formation‏‎ (12 links)
  483. Two Rivers Member‏‎ (12 links)
  484. St. Clair Limestone‏‎ (12 links)
  485. Troutman Member‏‎ (12 links)
  486. Waltersburg Formation‏‎ (12 links)
  487. Misenheimer Shale Member‏‎ (12 links)
  488. Anvil Rock Sandstone Member‏‎ (12 links)
  489. Backbone Limestone‏‎ (12 links)
  490. Neda Formation‏‎ (12 links)
  491. Brandon Bridge Member‏‎ (12 links)
  492. Potosi Dolomite‏‎ (12 links)
  493. Chalfin Member‏‎ (12 links)
  494. Beverly Tongue‏‎ (12 links)
  495. Schweizer Member‏‎ (12 links)
  496. Haeger Member‏‎ (12 links)
  497. Shorewood Member‏‎ (12 links)
  498. Glen Park Formation‏‎ (12 links)
  499. Porters Creek Formation‏‎ (12 links)
  500. Plaines Member‏‎ (12 links)

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