File:AS08-13-2266 (21764627840).jpg

Apollo 8 Hasselblad image from film magazine 13/E - Lunar Orbit, Trans-Earth Coast. The central part of this photo was used in Figure 2-20 (b) of the Analysis of Apollo 8 Photography and Visual Observations (SP-201), which has the following caption:

Apollo 8 photographs depicting large blocks of lunar rock. (a) Frame 2328-E, (b) frame 2266-E, (c) frame 2060-D.

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

Figure 2-20 is a set of Apollo 8 photographs depicting large blocks of lunar rocks. One segment of the crater is enlarged in figure 2-20(a). The layering is brought out by the effect of shadows (Sun angle 17°). In this 250-mm lens view, block fields are quite evident on the floor, along the terraced walls, and on the crater rim. Two large blocks, larger than 100 meters in diameter, are circled; one is on the rim and the other on the crater wall. Many other blocks are visible, especially near the upper edge of the photograph.

In figure 2-20(b), large blocks are clearly seen on the shadowed crater wall in the middle of the photograph. The area illustrated in figure 2-20(c) is within 5° on the lunar surface from the crater in figures 2- 19 and 2-20(a). In the center of the photograph, a small trough cuts through an old, subdued crater. Near the southern end of the trough, a large north-south-trending ridge or block can be seen clearly. This ridge resembles a half-buried disk standing on edge. A block near the northern end of the trough displays a similar form. (The block circled on the outer rim of the impact crater in fig. 2-20(a) bears similarity to this form.)