thumb|right|240px|Mosaic of oblique [[Lunar Orbiter 5 images, facing west]]
thumb|right|240px|Most of the interior of Birkhoff, facing west, also from Lunar Orbiter 5
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Birkhoff is a giant lunar walled plain that is located on the far side of the Moon, in the northern hemisphere. This class of formation is known as a peak ring basin, which has a single interior topographic ring or a discontinuous ring of peaks with no central peak.
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