Next, he adds additional texture with the geology hammer that he used on the Moon in November 1969 to do such things as plant the US flag on the Ocean of Storms, loosen the fuel element for the ALSEP, attempt to repair the broken TV camera, and drive core tubes deep into the lunar soil. Although the hammer was to have been discarded on the Moon, Alan Bean brought it back to Earth as his very special memento. With the hammer, he makes various marks in the hardening modeling paste. Other, round marks are added by pressing on the paste with one of the core tube bits used on the Moon to penetrate the lunar surface.  
(Left) Christian Lotzmann with the Apollo 12 geology hammer; (top right) Alan Bean hammering a core tube into the lunar surface; (bottom right) (1) circular core bit marks, (2) streaks made with the hammer
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