_:b1216428 . _:b1216428 . _:b1216428 "A plain that originally formed in a lacustrine environment, that is, as the bed of a lake, but from which the water has disappeared, by natural drainage, evaporation or other geophysical processes."^^ . _:b1216428 . _:b1216428 "Wikipedia:Lacustrine_plain"^^ .