English: Subframe of AS16-P-4131, with approximate north at bottom. The crater discussed below is now known as Mandel'shtam F crater. This is an approximate reconstruction of Figure 29-67 of the Apollo 16 Preliminary Science Report (SP-315, 1972), which has the following caption:

Enlarged photograph showing smooth, flowlike surfaces on western rim of crater from figure 29-66. Arrow indicates end of flowlike surface.

The text of the report refers to the figure as follows:

An excellent photograph of a crater (fig. 29-66) that is transitional between the smaller craters (2 to 10 km across) and the larger craters (40 to 90 km across) was obtained on the Apollo 16 mission. This crater is approximately 15 km across and lacks the terraced walls of the larger craters (40 to 90 km across). Although the crater floor cannot be seen, the form of the crater is more akin to the smaller craters (2 to 10 km across). Like the larger craters, the near-rim areas have radial rimmed channels but only a limited number of weakly developed concentric ridges and valleys. Beyond the near rim, the flanks are chiefly characterized by radial ridges, some braided and chevron!ike. 4t greater distances from the crater, alined, isolated, and clustered rimmed depressions are found. More importantly, smooth, flowlike surfaces extend from the crater rim over the near-rim surfaces and outward onto the flanks (fig. 29-67).

This is the smallest crater with these distinct smooth, flowlike units known to date. The example of a flowlike body shown in figure 29-67 originates near the rim of the crater, is approximately 0.5 km wide, and extends from the rim along an arcuate path some 3.0 km in length. Close inspection shows that there are three or four individual flows. The longest flow fills a small depression on the rim, whereas the others appear superposed on the larger one. The edges of the large flow are convex outward, although the center is somewhat depressed. Smaller flows form lobate, fingerlike extensions and are clearly convex upward and outward near their distal parts. One flow is particularly interesting because it is complex and composed of a broad ridge with a linear depression parallel to the ridge axis. On the downslope and more distal end of the depression, a smaller flow issues from the linear depression.

Photographic data:

Image Name: AS16-P-4131

Mission: Apollo 16

Revolution (Orbit): 17

Camera: Panoramic

Camera Tilt: Forward

Start Time: (DOY:112) 1972-04-21T03:27:53

Spacecraft Altitude: 117.81 km

Center Coordinates (lat, lon): 8.19°,165.66°

Sun Elevation: 14.0°

Film Type: 3414

Color: black&white