AS17-3062(P)

Figure 142

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This oblique view of the crater Timocharis in southeastern Mare Imbrium illustrates how the original diameter of a crater is enlarged by slumping of its walls. Its present diameter is about 35 km. The sparsity of small superposed craters on the walls of Timocharis - in contrast to their density on its floor and rim-is caused by the erosive effect of downslope movement of material on the steep walls. Timocharis, like many other young impact craters of similar size, possesses a well-defined central peak complex. Such structures are believed to result from elastic rebound of the bedrock immediately after the impacting event. However, the central peak of Timocharis apparently has been substantially modified by a large superimposed crater.
    -G.G.S.