"The [Barringer] crater was created about 50,000 years ago during the Pleistocene epoch, when the local climate on the Colorado Plateau was much cooler and damper.[9][10]
The area was an open grassland dotted with woodlands inhabited by woolly mammoths and giant ground sloths.[11][12]"
Though the meteorite itself is much older. Ni/Fe can only be fused in environments ~2.5 billion degrees Kelvin, thus it must have come from an earlier star that went supernova.