<p>Apollo 16 Hasselblad image from film magazine 121/PP - Lunar orbit.<br>This photo is used in Figure 4-37 of the <i>Apollo 16 Preliminary Science Report</i> (NASA SP-315), which has the following caption:<br>West wall of the far-side Crater Lobachevsky. The CMP described a black flow associated with a small crater in the wall of a large far-side crater. This oblique telephotograph northwestward across terrain in and northwest of Lobachevsky, an 80-km-diameter crater centered near latitude 9° N, longitude 113° E, shows a 2.5-km-diameter crater near the top of the west wall of the large crater. A tongue of low-albedo material extends approximately 2 km down the steep wall of Lobachevsky from the low point on the rim of the small crater.<br>
This photo was also used in Figure 110 of <i>Apollo over the Moon: A View from Orbit</i> (NASA SP-362), which has the following caption:<br></p>
An oblique view looking northwest at part of the wall of the crater Lobachevsky on the lunar far side. It shows a small crater on Lobachevsky's wall with unusual streaks of dark material that appear to have originated from the lower rim of the structure and to have moved down toward the floor of Lobachevsky. This feature was first noticed by T. K. Mattingly, the Apollo 16 CMP, who described the darker streaks as probable lava flows (Mattingly, El-Baz, and Laidley, 1972). However, the streaks can also be explained by the downslope movement of dark fragmental debris excavated from Lobachevsky's wall by the small crater. Closer to the lower border of the photograph is a bright area extending across Lobachevsky's rim. This area and other sinuous light-colored markings in the upper half of the photograph are on the periphery of an enormous field of light-colored swirls in this part of the far side (El-Baz, 1972a). The origin of the swirls is not well understood.-F.E.-B. (Farouk El-Baz)
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2015-10-06 10:33
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