The transgressive systems tract (TST) comprises the deposits accumulated from the onset of coastal transgression until the time of maximum transgression of the coast, just prior to renewed regression. parasequences onlap the sequence boundary in a landward direction and downlap onto the transgressive surface in a basinward direction. TST is the middle system track of both type 1 and type 2 sequences (Kendall and Alnaji, 2002).