aggradational

(3)进积/加积地层单元叠加样式。

(3)stacking patterns of progradational/aggradational stratigraphic units.

The distribution of petroleum in Africa is mainly in the negative region in the inner platform or in the aggradational basin of shore zone.

非洲石油主要分布在地台内部负向地区和海地带沉积盆地内。