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Showing below up to 100 results in range #21 to #120.

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21. Kewanee Group‏‎ (103 members)
22. Pope Megagroup‏‎ (96 members)
23. Carbondale Formation‏‎ (95 members)
24. Devonian System‏‎ (84 members)
25. Chesterian Series‏‎ (80 members)
26. Sandstone‏‎ (77 members)
27. Producing Zones and Informal Names‏‎ (76 members)
28. Sauk Sequence‏‎ (76 members)
29. Missourian Series‏‎ (74 members)
30. Valmeyeran Series‏‎ (70 members)
31. Mammoth Cave Limestone Megagroup‏‎ (68 members)
32. Cambrian System‏‎ (66 members)
33. Silurian System‏‎ (62 members)
34. Platteville Group‏‎ (62 members)
35. Trentonian Stage‏‎ (60 members)
36. Croixan Series‏‎ (60 members)
37. Knox Dolomite Megagroup‏‎ (58 members)
38. Bulletin 94‏‎ (57 members)
39. Galena Group‏‎ (56 members)
40. Spoon Formation‏‎ (51 members)
41. Middle Devonian Series‏‎ (50 members)
42. Shale‏‎ (49 members)
43. Modesto Formation‏‎ (46 members)
44. Plattin Subgroup‏‎ (46 members)
45. Ancell Group‏‎ (42 members)
46. Elviran Stage‏‎ (38 members)
47. Mattoon Formation‏‎ (38 members)
48. Kimmswick Subgroup‏‎ (36 members)
49. Alexandrian Series‏‎ (34 members)
50. McCormick Group‏‎ (32 members)
51. Embayment Megagroup‏‎ (32 members)
52. Dresbachian Stage‏‎ (32 members)
53. Bond Formation‏‎ (30 members)
54. Cincinnatian Series‏‎ (30 members)
55. Glasford Formation‏‎ (28 members)
56. Wedron Group‏‎ (28 members)
57. Gasperian Stage‏‎ (28 members)
58. Abandoned Names‏‎ (27 members)
59. Atokan Series‏‎ (26 members)
60. Dunleith Formation‏‎ (26 members)
61. Mesozoic Erathem‏‎ (24 members)
62. Bulletin 104‏‎ (24 members)
63. Abbott Formation‏‎ (24 members)
64. Knobs Megagroup‏‎ (24 members)
65. Trempealeauan Stage‏‎ (24 members)
66. Tertiary System‏‎ (22 members)
67. Banner Formation‏‎ (22 members)
68. Mason Group‏‎ (22 members)
69. Holocene Series‏‎ (20 members)
70. Maquoketa Shale Group‏‎ (20 members)
71. New Albany Shale Group‏‎ (20 members)
72. Cretaceous System‏‎ (20 members)
73. Niagaran Series‏‎ (20 members)
74. Decorah Subgroup‏‎ (20 members)
75. Potsdam Sandstone Megagroup‏‎ (18 members)
76. Kinderhookian Series‏‎ (18 members)
77. Virgilian Series‏‎ (18 members)
78. Franconian Stage‏‎ (18 members)
79. Soil‏‎ (16 members)
80. Genevievian Stage‏‎ (16 members)
81. Grand Detour Formation‏‎ (16 members)
82. Canadian Series‏‎ (16 members)
83. Mt. Simon Sandstone‏‎ (16 members)
84. Gulfian Series‏‎ (15 members)
85. Cedar Bluff Limestone Group‏‎ (14 members)
86. Upper Devonian Series‏‎ (14 members)
87. Paint Creek Group‏‎ (14 members)
88. West Baden Group‏‎ (14 members)
89. Okaw Group‏‎ (14 members)
90. Morrowan Series‏‎ (14 members)
91. Pecatonica Formation‏‎ (14 members)
92. Joachim Dolomite‏‎ (14 members)
93. Prairie du Chien Group‏‎ (14 members)
94. Wapsipinicon Limestone‏‎ (12 members)
95. Lingle Formation‏‎ (12 members)
96. Hombergian Stage‏‎ (12 members)
97. Caseyville Formation‏‎ (12 members)
98. Maysvillian Stage‏‎ (12 members)
99. Mifflin Formation‏‎ (12 members)
100. Glenwood Formation‏‎ (12 members)
101. Roxana Silt‏‎ (10 members)
102. Kankakee Formation‏‎ (10 members)
103. Joliet Formation‏‎ (10 members)
104. Grand Tower Limestone‏‎ (10 members)
105. Cedar Valley Limestone‏‎ (10 members)
106. Lower Devonian Series‏‎ (10 members)
107. Golconda Group‏‎ (10 members)
108. Salem Limestone‏‎ (10 members)
109. Ste. Genevieve Limestone‏‎ (10 members)
110. Scales Shale‏‎ (10 members)
111. Richmondian Stage‏‎ (10 members)
112. Ironton Sandstone‏‎ (10 members)
113. Raccoon Creek Group‏‎ (9 members)
114. Winnebago Formation‏‎ (8 members)
115. Kewaunee Formation‏‎ (8 members)
116. Lemont Formation‏‎ (8 members)
117. Renault Limestone‏‎ (8 members)
118. Ridenhower Formation‏‎ (8 members)
119. Menard Limestone‏‎ (8 members)
120. Clore Formation‏‎ (8 members)

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