Mare Smythii is located along the equator on the eastern
most edge of the near side. The Smythii basin where the
mare is located is of the Pre-Nectarian epoch, while the
surrounding features are of the Nectarian system. The mare
material, which make up the floor of the mare, is a high
alumious basalt, and consists of Upper Imbrian basalt
covered by Eratosthenian basalt.
The Crater located to the north of the mare, at the top of
the photo, is Neper. This crater makes up part of the
southern rim of Mare Marginis. Just off to the northwest of
the mare, you can make out the craters Schubert (top)and
Schubert B (bottom). The dark mare filled crater at the
southern edge of Smythii is the crater Kastner.
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