Sheetlike sandbody geometry is suspected and more open-marine deposition could be inferred, but fluvial depositional conditions also may be possible. Unimodal paleocurrents again dominate the highest part of the Dakota Formation, but with overall less directional variability than in the lower part of the unit. Higher in the Dakota Formation unimodal and bipolar paleocurrent azimuths are oriented nearly perpendicular to the axis of the sandbody, suggesting tidally influenced deposition. Rose diagram: Commonly, paleocurrent data are graphically represented on circular graphs that summarize current vector data. These suggest that sediments were carried by axial turbidity currents within the channel.
![paleocurrent rose diagram paleocurrent rose diagram](https://ars.els-cdn.com/content/image/1-s2.0-S001282521930594X-gr1.jpg)
Some of these sandstones have channel-like geometry and are situated in paleovalleys, with their mean paleocurrent direction oriented subparallel to the channel axis. The rose diagram shows a sediment supply from NE to SW, which is concordant with the previous interpretation of the paleocurrent evaluated from anomalies in seismic attributes and internal architectures of the channel complex (Noguchi et al., 2011). Although mean paleocurrent directions can differ markedly from outcrop to outcrop, most sandstones in the lower part of the Dakota Formation generally have unimodal paleocurrent directions.
![paleocurrent rose diagram paleocurrent rose diagram](https://ars.els-cdn.com/content/image/1-s2.0-S0098300499000722-gr5.gif)
A general southwestward direction of sediment transport is indicated (244° mean azimuth). This is a circular histogram on which directional data are plotted. The results of the proposed method are consistent with the petrophysical experiments. Palaeocurrent data are normally plotted on a rose diagram. Image logging data can be used to determine paleocurrent direction by using data statistics and rose diagram, which overcomes the limitation of field outcrop observations and improve the efficiency and accuracy of paleocurrent analysis. The procedure used for calculating the mean of a set of directional data is described below. Azimuth measurements of cross-stratified units were plotted in "rose diagrams" and examined with respect to their geographic and approximate stratigraphic position. Once a set of data has been collected it is useful to be able to determine parameters such as the mean direction and the spread about the mean (or standard deviation).
![paleocurrent rose diagram paleocurrent rose diagram](https://www.mdpi.com/geosciences/geosciences-11-00206/article_deploy/html/images/geosciences-11-00206-g006.png)
displayed with a Rose Diagram to show the dominant direction(s) of flow. A detailed paleocurrent study of Cretaceous Dakota Formation sandstones in Washington County, Kansas was undertaken to determine directions of sand movement and depositional environments along the eastern margin of the Western Interior Seaway. A paleocurrent or paleocurrent indicator is a geological feature (typically a sedimentary.