accommodation

aggradation

aggradational parasequence set

progradational parasequence set

retrogradational parasequence set

transgression

Lateral outbuilding, or progradation, of strata in a sea-ward direction. progradation can occur as a result of a sea-level rise accompanied by a high sediment flux (causing a regression). This latter usually occurs during the late stages of the development of a highstand systems tract and/or an falling stage systems tract.

A progradational stacking pattern of parasequences refers to the pattern in which facies at the top of each parasequence becomes progressively more proximal (Posamantier, 1999, Wilgus, 1988, Emery, 1986).