Figure 35
Click
here for larger NASA image
Click
here for lunar chart showing location
Click
here for larger NASA image
Click
here for lunar chart showing location
It is common for the circular form of a very old basin to survive
even after all basin materials are obliterated. Mare Vaporum, as shown
in this south looking oblique photograph, provides a good example. Its
average width is about 200 km. Its circular form marks the outer edge of
the ancient, deeply buried Vaporum basin. All the terrae surrounding Mare
Vaporum are blanketed by massive ejecta of the Imbrium basin, the center
of which lies to the north, behind and to the right of the camera. The
ejecta disappears beneath Mare Vaporum. The circularity is enhanced at
the left (east) of the picture by a system of mare ridges and scarps that
was localized over an old Vaporum basin ring. The cratered, linear Hyginus
Rille is near the southern horizon, and the sinuous Conon Rille, to be
described later, is in the foreground. D.E.W.
Report Source: NASA SP-362, Page 48, Figure
35
This web page was created by Francis Ridge
for The Lunascan Project
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