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Showing below up to 250 results in range #1 to #250.

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  1. (hist) ‎Caseyville Formation ‎[56,096 bytes]
  2. (hist) ‎Pennsylvanian Subsystem ‎[24,792 bytes]
  3. (hist) ‎Tiskilwa Formation ‎[17,733 bytes]
  4. (hist) ‎Lemont Formation ‎[17,243 bytes]
  5. (hist) ‎Kewaunee Formation ‎[15,607 bytes]
  6. (hist) ‎Delavan Member ‎[15,197 bytes]
  7. (hist) ‎Pleistocene Series ‎[14,997 bytes]
  8. (hist) ‎Silurian System ‎[14,116 bytes]
  9. (hist) ‎Equality Formation ‎[13,974 bytes]
  10. (hist) ‎Haeger Member ‎[13,694 bytes]
  11. (hist) ‎Henry Formation ‎[13,272 bytes]
  12. (hist) ‎Batestown Member ‎[13,265 bytes]
  13. (hist) ‎Roxana Silt ‎[12,975 bytes]
  14. (hist) ‎Lake Michigan Member ‎[12,710 bytes]
  15. (hist) ‎Cambrian System ‎[12,576 bytes]
  16. (hist) ‎Eastern Granite-Rhyolite Province (Basement) ‎[12,560 bytes]
  17. (hist) ‎Ordovician System ‎[12,399 bytes]
  18. (hist) ‎Yorkville Member ‎[12,289 bytes]
  19. (hist) ‎Peddicord Tongue ‎[12,134 bytes]
  20. (hist) ‎Glasford Formation ‎[11,427 bytes]
  21. (hist) ‎Peoria Silt ‎[11,361 bytes]
  22. (hist) ‎Banner Formation ‎[11,333 bytes]
  23. (hist) ‎Battery Rock Sandstone Member ‎[11,163 bytes]
  24. (hist) ‎Wadsworth Formation ‎[10,630 bytes]
  25. (hist) ‎Sangamon Soil ‎[10,505 bytes]
  26. (hist) ‎Devonian System ‎[10,172 bytes]
  27. (hist) ‎Ashmore Tongue ‎[9,988 bytes]
  28. (hist) ‎Mississippian Subsystem ‎[9,881 bytes]
  29. (hist) ‎Wedron Group ‎[9,854 bytes]
  30. (hist) ‎Pounds Sandstone Member ‎[9,639 bytes]
  31. (hist) ‎Mounds Gravel ‎[9,611 bytes]
  32. (hist) ‎Cretaceous System ‎[9,441 bytes]
  33. (hist) ‎Wayside Member ‎[9,417 bytes]
  34. (hist) ‎Mason Group ‎[9,223 bytes]
  35. (hist) ‎Two Rivers Member ‎[8,957 bytes]
  36. (hist) ‎Grigg tongue ‎[8,856 bytes]
  37. (hist) ‎Piatt Member ‎[8,839 bytes]
  38. (hist) ‎Sellers Limestone Bed ‎[8,707 bytes]
  39. (hist) ‎Gentry Coal Bed ‎[8,637 bytes]
  40. (hist) ‎Yarmouth Soil ‎[8,160 bytes]
  41. (hist) ‎Raccoon Creek Group ‎[8,045 bytes]
  42. (hist) ‎Grover Gravel ‎[8,040 bytes]
  43. (hist) ‎Shorewood Member ‎[7,998 bytes]
  44. (hist) ‎Racine Formation ‎[7,746 bytes]
  45. (hist) ‎Robein Member ‎[7,730 bytes]
  46. (hist) ‎Beverly Tongue ‎[7,677 bytes]
  47. (hist) ‎Chesterian Series ‎[7,632 bytes]
  48. (hist) ‎Manitowoc Member ‎[7,478 bytes]
  49. (hist) ‎Farmdale Soil ‎[7,408 bytes]
  50. (hist) ‎Cahokia Alluvium ‎[7,406 bytes]
  51. (hist) ‎Winnebago Formation ‎[7,044 bytes]
  52. (hist) ‎Precambrian Erathem ‎[6,683 bytes]
  53. (hist) ‎Kankakee Formation ‎[6,400 bytes]
  54. (hist) ‎Maquoketa Shale Group ‎[6,384 bytes]
  55. (hist) ‎Cedar Valley Limestone ‎[6,381 bytes]
  56. (hist) ‎Loveland Silt ‎[6,362 bytes]
  57. (hist) ‎Dunleith Formation ‎[6,166 bytes]
  58. (hist) ‎Morton Tongue ‎[6,124 bytes]
  59. (hist) ‎Kellerville Till Member ‎[6,080 bytes]
  60. (hist) ‎Afton Soil ‎[6,079 bytes]
  61. (hist) ‎Valmeyeran Series ‎[6,074 bytes]
  62. (hist) ‎Upper Devonian Series ‎[6,056 bytes]
  63. (hist) ‎Carbondale Formation ‎[6,010 bytes]
  64. (hist) ‎Champlainian Series ‎[5,963 bytes]
  65. (hist) ‎Burlington Limestone ‎[5,953 bytes]
  66. (hist) ‎Markham Silt Member ‎[5,885 bytes]
  67. (hist) ‎Grand Tower Limestone ‎[5,809 bytes]
  68. (hist) ‎St. Peter Sandstone ‎[5,790 bytes]
  69. (hist) ‎Bailey Limestone ‎[5,752 bytes]
  70. (hist) ‎Galena Group ‎[5,740 bytes]
  71. (hist) ‎Lingle Formation ‎[5,612 bytes]
  72. (hist) ‎Niagaran Series ‎[5,574 bytes]
  73. (hist) ‎Platteville Group ‎[5,481 bytes]
  74. (hist) ‎Chouteau Limestone ‎[5,325 bytes]
  75. (hist) ‎New Albany Shale Group ‎[5,280 bytes]
  76. (hist) ‎Ste. Genevieve Limestone ‎[5,279 bytes]
  77. (hist) ‎Kinderhookian Series ‎[5,273 bytes]
  78. (hist) ‎Cincinnatian Series ‎[5,226 bytes]
  79. (hist) ‎Enion Formation ‎[5,174 bytes]
  80. (hist) ‎Moccasin Springs Formation ‎[5,120 bytes]
  81. (hist) ‎Borden Siltstone ‎[5,093 bytes]
  82. (hist) ‎Shakopee Dolomite ‎[5,041 bytes]
  83. (hist) ‎Middle Devonian Series ‎[5,002 bytes]
  84. (hist) ‎Paleozoic Erathem ‎[4,985 bytes]
  85. (hist) ‎Potosi Dolomite ‎[4,918 bytes]
  86. (hist) ‎Glenwood Formation ‎[4,911 bytes]
  87. (hist) ‎Ironton Sandstone ‎[4,884 bytes]
  88. (hist) ‎Hulick Till Member ‎[4,863 bytes]
  89. (hist) ‎Joachim Dolomite ‎[4,862 bytes]
  90. (hist) ‎Salem Limestone ‎[4,820 bytes]
  91. (hist) ‎Spechts Ferry Formation ‎[4,792 bytes]
  92. (hist) ‎Herrin Coal Member ‎[4,788 bytes]
  93. (hist) ‎Mt. Simon Sandstone ‎[4,786 bytes]
  94. (hist) ‎Pearl Formation ‎[4,776 bytes]
  95. (hist) ‎Franconia Formation ‎[4,724 bytes]
  96. (hist) ‎Wapsipinicon Limestone ‎[4,711 bytes]
  97. (hist) ‎Lower Devonian Series ‎[4,711 bytes]
  98. (hist) ‎Guttenberg Formation ‎[4,679 bytes]
  99. (hist) ‎Toulon Member ‎[4,658 bytes]
  100. (hist) ‎Meadow Loess Member ‎[4,641 bytes]
  101. (hist) ‎Eau Claire Formation ‎[4,603 bytes]
  102. (hist) ‎Pike Soil ‎[4,602 bytes]
  103. (hist) ‎Knox Dolomite Megagroup ‎[4,587 bytes]
  104. (hist) ‎Lierle Clay Member ‎[4,573 bytes]
  105. (hist) ‎Quimbys Mill Formation ‎[4,553 bytes]
  106. (hist) ‎Grassy Creek Shale ‎[4,546 bytes]
  107. (hist) ‎Hannibal Shale ‎[4,541 bytes]
  108. (hist) ‎Cypress Sandstone ‎[4,541 bytes]
  109. (hist) ‎Abbott Formation ‎[4,509 bytes]
  110. (hist) ‎Keokuk Limestone ‎[4,507 bytes]
  111. (hist) ‎Sweetland Creek Shale ‎[4,487 bytes]
  112. (hist) ‎Main Page ‎[4,484 bytes]
  113. (hist) ‎Informal Oil Field Names ‎[4,470 bytes]
  114. (hist) ‎Menard Limestone ‎[4,460 bytes]
  115. (hist) ‎Yankeetown Sandstone ‎[4,446 bytes]
  116. (hist) ‎McDonough Loess Member ‎[4,422 bytes]
  117. (hist) ‎Wise Lake Formation ‎[4,393 bytes]
  118. (hist) ‎Louisiana Limestone ‎[4,377 bytes]
  119. (hist) ‎Petersburg Silt ‎[4,368 bytes]
  120. (hist) ‎Aux Vases Sandstone ‎[4,335 bytes]
  121. (hist) ‎Absaroka Sequence ‎[4,326 bytes]
  122. (hist) ‎Edgewood Formation ‎[4,313 bytes]
  123. (hist) ‎Saverton Shale ‎[4,309 bytes]
  124. (hist) ‎Sugar Run Formation ‎[4,308 bytes]
  125. (hist) ‎Mosalem Formation ‎[4,284 bytes]
  126. (hist) ‎Glen Park Formation ‎[4,263 bytes]
  127. (hist) ‎Mifflin Formation ‎[4,251 bytes]
  128. (hist) ‎Dutch Creek Sandstone Member ‎[4,244 bytes]
  129. (hist) ‎Meppen Limestone ‎[4,235 bytes]
  130. (hist) ‎Grand Detour Formation ‎[4,225 bytes]
  131. (hist) ‎Joliet Formation ‎[4,222 bytes]
  132. (hist) ‎Alto Formation ‎[4,215 bytes]
  133. (hist) ‎Tete de Morts Formation ‎[4,207 bytes]
  134. (hist) ‎St. Clair Limestone ‎[4,176 bytes]
  135. (hist) ‎Pecatonica Formation ‎[4,159 bytes]
  136. (hist) ‎St. Louis Limestone ‎[4,158 bytes]
  137. (hist) ‎Teneriffe Silt ‎[4,126 bytes]
  138. (hist) ‎Nachusa Formation ‎[4,106 bytes]
  139. (hist) ‎Clear Creek Chert ‎[4,072 bytes]
  140. (hist) ‎Tar Springs Sandstone ‎[4,071 bytes]
  141. (hist) ‎Decorah Subgroup ‎[4,061 bytes]
  142. (hist) ‎Galesville Sandstone ‎[4,039 bytes]
  143. (hist) ‎Fraileys Shale ‎[4,031 bytes]
  144. (hist) ‎Oneota Dolomite ‎[4,029 bytes]
  145. (hist) ‎Mahomet Sand Member ‎[4,014 bytes]
  146. (hist) ‎Modesto Formation ‎[4,002 bytes]
  147. (hist) ‎Berry Clay Member ‎[4,000 bytes]
  148. (hist) ‎Chapin Soil ‎[3,999 bytes]
  149. (hist) ‎Hardinsburg Sandstone ‎[3,991 bytes]
  150. (hist) ‎Haney Limestone ‎[3,986 bytes]
  151. (hist) ‎Harkness Silt Member ‎[3,981 bytes]
  152. (hist) ‎McNairy Formation ‎[3,980 bytes]
  153. (hist) ‎Radnor Till Member ‎[3,971 bytes]
  154. (hist) ‎Hunton Limestone Megagroup ‎[3,957 bytes]
  155. (hist) ‎Morrowan Series ‎[3,941 bytes]
  156. (hist) ‎Ridenhower Formation ‎[3,931 bytes]
  157. (hist) ‎McLeansboro Group ‎[3,895 bytes]
  158. (hist) ‎Springfield and Harrisburg Coal Members ‎[3,890 bytes]
  159. (hist) ‎Warsaw Shale ‎[3,889 bytes]
  160. (hist) ‎McCraney Limestone ‎[3,861 bytes]
  161. (hist) ‎Waltersburg Formation ‎[3,858 bytes]
  162. (hist) ‎Ullin Limestone ‎[3,837 bytes]
  163. (hist) ‎Neda Formation ‎[3,830 bytes]
  164. (hist) ‎Marcus Formation ‎[3,823 bytes]
  165. (hist) ‎Mattoon Formation ‎[3,823 bytes]
  166. (hist) ‎Kings Lake Formation ‎[3,802 bytes]
  167. (hist) ‎Kinkaid Limestone ‎[3,797 bytes]
  168. (hist) ‎Sankoty Sand Member ‎[3,792 bytes]
  169. (hist) ‎Eminence Formation ‎[3,768 bytes]
  170. (hist) ‎Spoon Formation ‎[3,767 bytes]
  171. (hist) ‎Desmoinesian Series ‎[3,751 bytes]
  172. (hist) ‎Blanding Formation ‎[3,748 bytes]
  173. (hist) ‎Clore Formation ‎[3,734 bytes]
  174. (hist) ‎Colchester Coal Member ‎[3,723 bytes]
  175. (hist) ‎Rock Island Coal Member ‎[3,711 bytes]
  176. (hist) ‎Alexandrian Series ‎[3,694 bytes]
  177. (hist) ‎Dubuque Formation ‎[3,690 bytes]
  178. (hist) ‎Downeys Bluff Limestone ‎[3,684 bytes]
  179. (hist) ‎Brereton Limestone Member ‎[3,683 bytes]
  180. (hist) ‎Fern Glen Formation ‎[3,682 bytes]
  181. (hist) ‎Springville Shale ‎[3,680 bytes]
  182. (hist) ‎Palestine Sandstone ‎[3,668 bytes]
  183. (hist) ‎Mesozoic Erathem ‎[3,668 bytes]
  184. (hist) ‎Cayugan Series ‎[3,667 bytes]
  185. (hist) ‎Beech Creek Limestone ‎[3,663 bytes]
  186. (hist) ‎Bond Formation ‎[3,661 bytes]
  187. (hist) ‎Tuscaloosa Formation ‎[3,655 bytes]
  188. (hist) ‎Dutchtown Limestone ‎[3,651 bytes]
  189. (hist) ‎Duncan Mills Member ‎[3,646 bytes]
  190. (hist) ‎Sweeney Formation ‎[3,614 bytes]
  191. (hist) ‎Girardeau Limestone ‎[3,599 bytes]
  192. (hist) ‎Anvil Rock Sandstone Member ‎[3,589 bytes]
  193. (hist) ‎Ogle Till Member ‎[3,581 bytes]
  194. (hist) ‎New Richmond Sandstone ‎[3,581 bytes]
  195. (hist) ‎Sonora Formation ‎[3,578 bytes]
  196. (hist) ‎Drury Shale Member ‎[3,564 bytes]
  197. (hist) ‎Wilhelmi Formation ‎[3,547 bytes]
  198. (hist) ‎Missourian Series ‎[3,547 bytes]
  199. (hist) ‎Fort Payne Formation ‎[3,543 bytes]
  200. (hist) ‎Atokan Series ‎[3,543 bytes]
  201. (hist) ‎Kewanee Group ‎[3,504 bytes]
  202. (hist) ‎Francis Creek Shale Member ‎[3,500 bytes]
  203. (hist) ‎Prospect Hill Siltstone ‎[3,497 bytes]
  204. (hist) ‎Plattin Subgroup ‎[3,479 bytes]
  205. (hist) ‎Glen Dean Limestone ‎[3,471 bytes]
  206. (hist) ‎Prairie du Chien Group ‎[3,455 bytes]
  207. (hist) ‎Baylis Formation ‎[3,451 bytes]
  208. (hist) ‎Pleasant Grove Soil ‎[3,436 bytes]
  209. (hist) ‎Sexton Creek Limestone ‎[3,427 bytes]
  210. (hist) ‎Geneva Dolomite Member ‎[3,422 bytes]
  211. (hist) ‎Harrodsburg Limestone Member ‎[3,407 bytes]
  212. (hist) ‎McCormick Group ‎[3,405 bytes]
  213. (hist) ‎Cenozoic Erathem ‎[3,395 bytes]
  214. (hist) ‎Blocher Shale ‎[3,382 bytes]
  215. (hist) ‎Renault Limestone ‎[3,376 bytes]
  216. (hist) ‎Sterling Till Member ‎[3,366 bytes]
  217. (hist) ‎Fort Atkinson Limstone ‎[3,346 bytes]
  218. (hist) ‎Spar Mountain Sandstone Member ‎[3,336 bytes]
  219. (hist) ‎Grove Church Shale ‎[3,322 bytes]
  220. (hist) ‎Pope Megagroup ‎[3,320 bytes]
  221. (hist) ‎North Hill Group ‎[3,316 bytes]
  222. (hist) ‎Starved Rock Sandstone Member ‎[3,304 bytes]
  223. (hist) ‎Mammoth Cave Limestone Megagroup ‎[3,303 bytes]
  224. (hist) ‎Scales Shale ‎[3,302 bytes]
  225. (hist) ‎Cape Limestone ‎[3,289 bytes]
  226. (hist) ‎Roby Silt Member ‎[3,288 bytes]
  227. (hist) ‎Rapid Member ‎[3,285 bytes]
  228. (hist) ‎Lusk Shale Member ‎[3,282 bytes]
  229. (hist) ‎Tertiary System ‎[3,272 bytes]
  230. (hist) ‎New London Member ‎[3,263 bytes]
  231. (hist) ‎St. David Limestone Member ‎[3,259 bytes]
  232. (hist) ‎Conant Limestone Member ‎[3,226 bytes]
  233. (hist) ‎Cave Hill Shale Member ‎[3,225 bytes]
  234. (hist) ‎Jules Soil ‎[3,217 bytes]
  235. (hist) ‎Potsdam Sandstone Megagroup ‎[3,212 bytes]
  236. (hist) ‎Elwood Formation ‎[3,211 bytes]
  237. (hist) ‎Starrs Cave Limestone ‎[3,207 bytes]
  238. (hist) ‎Chapel Coal Member ‎[3,195 bytes]
  239. (hist) ‎Glenhaven Member ‎[3,186 bytes]
  240. (hist) ‎Degonia Sandstone ‎[3,173 bytes]
  241. (hist) ‎Vandalia Till Member ‎[3,158 bytes]
  242. (hist) ‎Hoing Sandstone Member ‎[3,158 bytes]
  243. (hist) ‎Rosiclare Sandstone Member ‎[3,156 bytes]
  244. (hist) ‎Misenheimer Shale Member ‎[3,153 bytes]
  245. (hist) ‎Kimmswick Subgroup ‎[3,132 bytes]
  246. (hist) ‎Croixan Series ‎[3,130 bytes]
  247. (hist) ‎Porters Creek Formation ‎[3,109 bytes]
  248. (hist) ‎Bethel Sandstone ‎[3,106 bytes]
  249. (hist) ‎Glencoe Member ‎[3,104 bytes]
  250. (hist) ‎St. James Member ‎[3,094 bytes]

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