In Pennsylvania and Permian time, segments of the southwestern corner of the craton were strongly uplifted into arches and domes that were eroded and supplied coarse detritus to the basins nearby.
This fragmentation of the platform area near the south end of the Transcontinental Arch may have been connected with growing tectonic unrest in the Ouachita and Cordilleran geosynclines which embrace this corner of the craton.
The subsidence of some of the basins in response to the uplift of adjacent highlands suggests that transfer of material by erosion and sedimentation from the high segment of lithosphere to the low segment is compensated for in the asthenosphere by a transfer of plastic material from the low to the high segments.
Such basins have been called yoked basins because their subsidence appears to be connected (or yoked) to the uplift of a neighboring block.
The boundary between the basin and the uplift may be a simple flexure or a fault.