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

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。

This image shows part of a 7.4-mile-diameter impact crater on Mars' southern hemisphere.

这张照片展示了位于火星南半球一个直径11公里冲击陨坑的一部分。

For scale, the large impact crater in lower right corner is about 18.5 miles, or 30 km, wide.

右下角的巨大陨石坑按比例宽约18.5英里，或30公里。

This image shows the west-facing side of an impact crater in the mid-latitudes of Mars' northern hemisphere.

这幅图片显示了火星北半球中纬度地区的一个面向西侧的陨石坑。

They conducted surveys at numerous sites in Mexico, including a spot called El Peñón, near the impact crater.

他们在墨西哥的很多地区，包括一个在陨石坑附近的叫做El Peñón的地区进行了调查。