the hills and rugged terrain to the left of Nawahi in the image are part of the Caloris basin rim. A portion of Munch is visible to the right of the image.
Nawahi is a crater on Mercury. Nawahi crater is located within the large Caloris impact basin. The unusual dark material creating a halo around Nawahi makes this crater of special interest, as the dark material likely represents rocks with a different chemical and mineralogical composition than those of the neighboring surface.
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