Younger Dryas deposits

Vertical

Dark layer, the “black mat,” comprises carbon-rich sediments at the bottom of Younger Dryas deposits. Below: A mammoth tooth from underneath the Younger Dryas layer in Arizona is stained on top by the black mat.

YDB Working Group

Horizontal

Dark layer, the “black mat,” comprises carbon-rich sediments at the bottom of Younger Dryas deposits. Below: A mammoth tooth from underneath the Younger Dryas layer in Arizona is stained on top by the black mat.

YDB Working Group

Thumb

Dark layer, the “black mat,” comprises carbon-rich sediments at the bottom of Younger Dryas deposits. Below: A mammoth tooth from underneath the Younger Dryas layer in Arizona is stained on top by the black mat.

YDB Working Group
view counter

Recent Stories

Elephant populations continue to dwindle in Tanzania.

With proper safeguards, water currents can be harnessed out of sight.

Barely pulled back from the brink of extinction, California condors are still being poisoned by lead-based ammunition.

Vulnerable everywhere in the wild, lions already face regional extinction.