In MESSENGER's view, the crater floor is seen to be filled with an intricate series of cracks, formed as the molten surface resulting from the impact cooled and contracted.
信使号太空船在德加陨石坑表面观测到因熔融冷却收缩所产生的斑驳裂痕。
Thin, long wear sheets are formed and removed when cracks extend to the surface.
当裂纹扩展到表面时，形成并分离出薄而长的磨损碎片。
Thin, long wear sheets are formed and removed when cracks extend to the surface.
当裂纹扩展到表面时，形成并分离出薄而长的磨损碎片。
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