FIGURE 19. Side scan sonar image for Mississippi Fan illustrating the detailed sand-body architecture. The bright colors represent more sand-prone regions of the fan. The map pattern of this modern fan, which has been rotated to match the orientation of the Diana net-to-gross model, is extremely similar to the map pattern produce by the Diana net-to-gross model. This similarity between the map patterns of the Mississippi Fan and the object-based model for the A-50 reservoir helps to validate the modeling effort (modified from Twichell et al., 1995).