To solve Mid-Continent stratigraphic problems, new dipmeter techniques recently have been developed which feature short-correlation-interval dip computations and a statistical approach to interpretation. These techniques are extensions of dipmeter-interpretation methods first introduced in the Gulf Coast.

Paleozoic sandstones, for example those in the Pennsylvanian section of the Anadarko basin, usually were deposited on essentially flat surfaces. In these nearly parallel beds, cross-stratification anomalies produce most of the dips computed.

To detect cross-bedding and describe its orientation within thin sedimentary units, independent correlation intervals must yield computed dips for every few feet of hole. Correlations are influenced by many factors, such as the attitude of the underlying surface at the time of deposition, and subsequent tilting. Many of the dips computed were caused by current bedding, and they indicate the direction of sediment transport.

Random variations in sedimentation can cause confusion if the data are studied superficially. To emphasize trends and minimize random events, statistical methods are used. Azimuth-frequency diagrams and modified Schmidt plots show the direction of sediment transport, the direction of interval thickening, and present structural dip. These methods improve the accuracy of the orientation and extrapolation of sandstone isopachous contours.