January 12, 2009
Zupiddy Do Da
<img src="" alt="LPOD-Jan12-09.jpg" title="LPOD-Jan12-09.jpg" style="width: 800px;" />
image by Mario Weigand, Offenbach am Main, Germany
Zupus is the dark patch near the center of this frame. It's name implies that it is a crater, but is it? It doesn't have a rim, just a massive ridge to its east. The name was given by Riccioli, whose view of it was vastly poorer than Mario has provided us. Look at the surface texture surrounding Zupus - it is rough and there are small hills sticking out. This surface material is basin ejecta, which could be from the Orientale Basin to the west or the Imbrium one to the north. I would guess that the ejecta destroyed all the rim except for the remaining ridge. The floor of the ex-crater remained a low spot, and fractures under the crater allowed mare basalts to rise up and erupt on the surface. Two sets of rilles are also well shown here. At the 11 o'clock direction from Zupus is an unusual non-mare rille. We named it Chuck Wood</em>
See image margin.
Rükl plate 51
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