The Wheeler diagram is a type of chronostratigraphic chart and is one of the fundamental instru-ments available in the geologists' toolkit that is used to understand spatiotemporal relationships of.. To display the Wheeler diagram, the user clicks the "Display Wheeler" button and the Wheeler diagram is displayed in the lower axes. If the "U" checkbox is selected, the program displays sequence tracts that have the same classification using the same color. When the "Save Figures" button is clicked the program generates nine output.
Wheeler diagrams are originally based on relative dating methods, whereas the absolute dating comes after the preparation of Wheeler diagrams. This is the reason why two types of chronostratigraphic charts exist (Fig. 3) as described by Qayyum et al. (2015c). The charts based on a relative dating method are initially arbitrary.. The Wheeler diagram is a spatio-temporal plot, showing the (usually one dimensional) spatial distribution of sedimentary facies through time in a two-dimensional chart. Three-dimensional seismic data allows the construction of three-dimensional Wheeler 'diagrams', but these are rare because of the difficulty of producing them..