This is figure 5-73 (b) of the <i>Apollo 15 Preliminary Science Report</i> (NASA SP-289, 1972), which has the following caption:<br>Sample 15016, collected from station 3. (a) Presampling, cross-Sun photograph, looking south. (b) Sample environment sketch map.<br>Sample 15016 is known as the <a href="https://en.wikipedia.org/wiki/Seatbelt_basalt" class="extiw" title="en:Seatbelt basalt">Seatbelt basalt</a>.
NASA Manned Spacecraft Center
1972
<i>Apollo 15 Preliminary Science Report</i> (NASA SP-289, 1972)