[newsuser]

This one is 11700 yo and 900 meters in diameter, but TIL that people are also fond of looking for fresh (<10k yo) craters [1] as small as 24 metres [2].

[1] https://en.wikipedia.org/wiki/List_of_impact_structures_on_E...

[2] https://en.wikipedia.org/wiki/Dalgaranga_crater