其它矿藏要么是由沉淀物生成的，要么处于撞击火山的中心。

In other deposits, they're either sedimentary, or in the center of an impact crater.

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火星表面显示出广泛的地质特征，包括巨大的火山——太阳系中已知的最大的火山——和广阔的撞击坑。

The surface of Mars shows a wide range of geologic features, including huge volcanoes—the largest known in the solar system—and extensive impact cratering.

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此外，撞击留下的大块物质会在主火山口周围形成二级火山口。

Also, large blocks thrown aside by the impact would form secondary craters surrounding the main crater.

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