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Oacoma, South Dakota 57365
(Photos)
Oacoma South Dakota
Oacoma South Dakota
Oacoma South Dakota
Oacoma South Dakota
Oacoma South Dakota
Oacoma South Dakota
Oacoma South Dakota
Oacoma South Dakota
Oacoma South Dakota
Oacoma,SD
Oacoma,SD
Yellowish shales of the Sharon Springs Member of the Pierre Formation (above) and dark chalk of the Smoky Hill Member of the Niobrara Formation (below), both Upper Cretaceous, Oacoma, South Dakota.
Erosion control blocks of Sioux Quartzite (Paleoproterozoic, 1.65-1.70 Ga; Interstate 90 at the Missouri River, Oacoma, South Dakota, USA)
Yellowish shales of the Sharon Springs Member of the Pierre Formation (above) and dark chalk of the Smoky Hill Member of the Niobrara Formation (below), both Upper Cretaceous, Oacoma, South Dakota.
Shale of the Sharon Springs Member of the Pierre Formation (Upper Cretaceous), Oacoma, South Dakota.
White chalk layer in shale of the Sharon Springs Member of the Pierre Formation (Upper Cretaceous), Oacoma, South Dakota.
Yellowish shales of the Sharon Springs Member of the Pierre Formation (above) and dark chalk of the Smoky Hill Member of the Niobrara Formation (below), both Upper Cretaceous, Oacoma, South Dakota.
Yellowish shales of the Sharon Springs Member of the Pierre Formation (above) and dark chalk of the Smoky Hill Member of the Niobrara Formation (below), both Upper Cretaceous, Oacoma, South Dakota.
Bentonite beds in dark chalk of the Smoky Hill Member of the Niobrara Formation (Upper Cretaceous), Oacoma, South Dakota.
Yellowish shales of the Sharon Springs Member of the Pierre Formation (above) and dark chalk of the Smoky Hill Member of the Niobrara Formation (below), both Upper Cretaceous, Oacoma, South Dakota.
Dark chalk of the Smoky Hill Member of the Niobrara Formation (Upper Cretaceous), Oacoma, South Dakota.
Inoceramus bivalve fragment from the Smoky Hill Member of the Niobrara Formation (Upper Cretaceous), Oacoma, South Dakota.
Bentonite on dark chalk of the Smoky Hill Member of the Niobrara Formation (Upper Cretaceous), Oacoma, South Dakota.
missouri_river_oacoma_sd_23_2011-05-25.4288x2848
missouri_river_oacoma_sd_26_2011-05-25.4288x2848
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