walled plain

noun

a circular or almost circular area on the moon, sometimes with a floor that is depressed, usually partially enclosed by walls that rise to varying heights and that are usually lower than those of a crater.

walled plain

any of the largest of the lunar craters, having diameters between 50 and 300 kilometres

Moving almost due south, we passed the large but partially ruined walled plain known as Maginus.

It was a wonderful sunset effect in that mountain-dotted, mountain-walled plain, the San Luis Valley.

Browse