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49:Pages in category "Devonian geology of Virginia"
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224:Geologic formations of Virginia
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229:Devonian United States
135:Marcellus Formation
84:Foreknobs Formation
193:Ridgeley Sandstone
169:Oriskany Formation
164:Onondaga Limestone
111:Huntersville Chert
72:Brallier Formation
33:Onondaga limestone
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205:Scherr Formation
123:Keyser Formation
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218:Categories
159:Ohio Shale
37:(7 P)
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200:S
188:R
176:P
154:O
142:N
130:M
118:K
91:H
79:F
62:B
26:O
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