SciencePrehistoric (Younger Dryas boundary, ~12,800 years ago)Middle East (Abu Hureyra, Syria)high confidence

Abu Hureyra's melt glass contained molten quartz, chromferide, and magnetite grains, minerals that melt only at temperatures between 1,720°C and 2,200°C.

Notes on verification

Directly matches wording and figures from the peer-reviewed Moore et al. 2020 Scientific Reports paper, corroborated by independent science journalism (Eos/AGU). The broader impact-origin interpretation of this meltglass is scientifically contested, but the specific mineral/temperature data point is accurately reported. [tier=gold indep_score=0.983 clusters=3 claim_tier=notable]

Sources

Abu Hureyra's melt glass contained molten quartz, chromfe… · DeepInquiry