Sounds very much like what you would expect from the cataclysm hypothesized by Firestone et al. Multiple bolides striking the earth in the Great Lakes/Canada area, instant glacial/ice cap melting and floods, the giant animals like mammoths, etc. killed. It is amazing that this could have been remembered for 12,000 years, so it must have been incredibly awesome.
from the article:
... He examined over 90 sites in the Middle East and beyond and concluded that in the Bronze Age period alone there had been six destructive layers of varying intensity...
Around 4,000 years ago the Bronze Age came to Britain. This was the crucial period that linked the Stone Age with the Iron Age