Highstand System Track (HST)

In Highstand system tracks, sea level rise reaches maximum, the inundated self has continued prograding and carbonate sedimentation and accumulation reached a maximum.These highstand system tracks retain the sediment shift of the types of sediments being deposited onto the slopes receiving an increase in carbonate sediment from the excess shelf carbonate accumulation. Sea level rise also shifts carbonate transport further out onto the slope increasing the surface area onto which the sediment may be deposited. As highstand progresses the on-lap at maximum transgression or highstand often leads to sediment starvation and the deposition of pelagic and hemi-pelagic shifting to an apparent off or down-lap leading to the initial phases of a falling systems track (FST).