Meanings of walled plain in English

PONTECOULANT.- Agreatirregular walled plain, about 100 miles in length, near the S.W.

East and west ran the Alps, merging on the eastern side of the Observatory into the walled plain of Plato.

It is the great walled plain, one of the finest on the Moon, known as the Mare Crisium-theSea of Crises.

On every side but the N., Pitatus is a walled plain of an especially massive type, the border on the S.E.

At last the whole of the walled plain lay spread out behind them, while ahead was range after range of broken hills.

MANZINUS.- Awalledplain, nearly 62 miles in diameter, with a terraced rampart rising to a height of more than 14,500 feet above the interior.