The identification of deficiencies and errors in the presuppositions and methods of uniformitarian natural history should be accompanied by an empirical reinterpretation of geological data within the Biblical worldview. The wealth of geological and geophysical data demands a systematic replacement of the ruling paradigm by creationist explanations of the rock record. Such a reinterpretation is underway for the geology of Kansas, and the first step in that project addresses the basement. The erosional contact be tween the crystalline basement and overlying sediments can be interpreted as the erosional basal Flood boundary. The exception to this interpretation is found at the Midcontinent Rift System, a complex of basalt flows and adjoining sedimentary basins. This feature is interpreted as the tectonic basal Flood boundary, marking tectonic disruption associated with the Flood onset, with both basalt flows and sedimentation occurring between the onset of the Flood and its marine inundation of the region.