! ! ! ! Footprints in the ash
Footprints left in volcanic ash that fell in central Mexico’s Valsequillo Basin about 40,000 years ago are evidence that humans have inhabited the Americas far longer than previously confirmed, a new study suggests.
Analyses of three-dimensional laser scans of the imprints (example at right) confirm their human origin, says Silvia Gonzalez, a geoarchaeologist at Liverpool John Moores University in England.
Previous finds of human remains elsewhere in the region couldn’t be precisely dated because they were found in layers of mixed gravels that probably incorporated materials of many different ages.
I remember (I think) posting something about this a couple of years ago. Then, the dating of the ash layer was controversial, some having the stuff as 1+ millions years old. And the human nature of the footprints was also in question. We at ArchaeoBlog remain dubious.