NASA's Mars Global Surveyor shows a circular feature on the martian northern plains. It was once a crater formed by meteoritic impact. It was completely filled and buried by and within layered material.

4 June 2005
This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows a circular feature on the martian northern plains. It was once a crater formed by meteoritic impact. It was completely filled and buried by and within layered material. Later, the layered materials have begun to be eroded away, re-exposing the old crater rims in the process.

Location near: 44.9°N, 264.7°W
Image width: ~3 km (~1.9 mi
Illumination from: lower left
Season: Northern Autumn

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