That’s swale!

I am cataloging a map of Mars with the following topographic features: ridge crests, berms, swales, scarp crests, and crater forms. I looked up the definitions and found swell-and-swale topography in the AGI Glossary.

swell-and-swale topography  A low-relief, undulating landscape characteristic of the ground moraine of a continental glacier, exhibiting gentle slopes and well-rounded hills interspersed with shallow depressions.

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