Fig. 9
Schematic model showing the origin of thickening-upward cycles. At a specific point (red lines), from t1, t2, to t3, progradation of multiple flows result in the formation of TUC. Cross-sections depict interbedded sandstone (yellow) and mudstone (grey), showing deposits at a Distal; b Medial; and, c Proximal part. After one TUC forms, avulsion occurs (t4) and another TUC starts to develop