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The Adell field in northeastern Sheridan County, Kansas, and other smaller fields in the area, produce oil from multiple zones of the Lansing-Kansas City. Porous zones of this age are shoal deposits consisting of rounded carbonate grains, many of which have superficial oolitic coating. Carbonate grain distribution was controlled by water turbulence and relief on the sea floor. The Jennings anticline existed during Lansing-Kansas City deposition and provided the necessary relief on the sea floor for shoals to occur. Differential rates of sea-floor subsidence and cyclic nature of sediment accumulation account for the multiple porous pay zones which are stacked on top of each other.
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