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Fig. 3

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Evolution of three sample surfaces with high organic content under vertical insolation. The reduction in the sample volume andthe formation of fractures (some marked with arrows) can be observed in all three image series (online movies). This surface evolution is most distinctly observable in the top series, with an organic-to-ice-to-dust mass ratio of 10:100:300, whose phase of activity ended after 12 h. The degree of surface alteration and its duration decreased with increasing amounts of the dust component and ended after 8 and 6 h, respectively.

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