| 11. | This is a relatively fresh feature that has not been significantly worn through impact erosion.
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| 12. | This is a relatively fresh crater formation that has not been degraded through impact erosion.
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| 13. | The rim and inner walls are rounded from impact erosion, and have lost some definition.
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| 14. | It has a well-formed edge that has not been noticeably degraded through impact erosion.
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| 15. | The rim is not significantly worn due to impact erosion, and the edge remains sharp.
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| 16. | This crater has been worn by impact erosion, leaving the features rounded and somewhat irregular.
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| 17. | This crater has a deteriorated outer rim that has been worn down and reshaped through impact erosion.
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| 18. | This crater has undergone a degree of impact erosion that has left its features softened and rounded.
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| 19. | This crater has a well-defined outer rim that is only mildly worn by impact erosion.
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| 20. | This crater has a well-defined rim that has not suffered much wear from impact erosion.
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