Structure: | THE AREA IS CHARACTERIZED BY A SLIGHT REGIONAL DIP, 12 FT/MI (2.27 M/KM), NORTHEASTWARD TOWARD THE CENTER OF THE DAKOTA (WILLISTON) BASIN. THERE ARE OCCASIONAL SMALL SECONDARY FAULTS AND FOLDS (DIPS LESS THAN ONE DEGREE) WHOSE AMPLITUDES AND DISPLACEMENTS ARE USUALLY LESS THAN 20 FT (6.10 M). THERE IS NO CONSISTENT DIRECTION OF STRIKE FOR THESE MINOR STRUCTURES. |