 Two papers were published dealing with an "extraordinary biomass-burning episode" associated with the Younger Dryas Impact.In 2019, scientists reported evidence in sediment layers with charcoal and pollen assemblages both indicating major disturbances at Pilauco Bajo, Chile in sediments dated to 12,800 BP.This included rare metallic spherules, melt glass and nanodiamonds thought to have been produced during airbursts or impacts.