paleoplain

paleoplain

[′pāl·ē·ə‚plān]
(geology)
An ancient degradational plain that is buried beneath later deposits.
References in periodicals archive ?
Overall gradients are above 1% and in the case of steep slopes, 10%, descending from the pampa plain to a low-lying paleoplain. It is in this very low-lying section that the lowest depression of all occurs--20 m (65.6 ft) below sea level--occupied by the Chasico Lagoon, lying partly within the Puan district.
These deposits acquire the characteristics of colluvium on the slopes and give rise to a dune relief in the paleoplain.