The Arbuckle surface on the nucleus of the often rejuvenated northwest-southeast-trending Central Kansas uplift was exposed as a land mass at intervals before the first Pennsylvanian sea invasion, for sufficient time to permit the positive and negative features of topography to be well developed. Subsequent movements have not greatly altered the detail topography on this nucleus. As a consequence, dendritic and radial drainage patterns can be traced by well control throughout the area. These channels are largely responsible for the separation of most of the buried hills which are now productive of oil. Outside the nucleus of the uplift, the above principles still apply, although they play a minor role in some areas as a result of early Pennsylvanian movement.

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