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Finally Available in PNAS: Very High Temperature Impact Melt Products: Evidence for Cosmic Impacts \ Airbursts 12,900 years ago
event June 18, 2012 comment 45 Comments

These scientists have identified three contemporaneous levels more than 12,000 years ago, on two continents yielding siliceous scoria-like objects (SLO’s),” said H. Richard Lane, program director of National Science Foundation’s Division of Earth Sciences, which funded the research. “SLO’s are indicative of high-energy cosmic airbursts/impacts, bolstering the contention that these events induced the beginning of the Younger Dryas. That time was a major departure in biotic, human and climate history.

Ted Bunch

Hard link to full and free PNAS

Bunch, Hermes, Mooreet al,

 

Cosmic Airbursts – Impacts Leave High Temperature Melt Products at Younger Dryas by George Howard

airburst ancient nuclear asteroid clovis firestone impact impact melt glass James Kennett mammoths meteor pennsylvania PNAS scoria south carolina syria Ted Bunch ucsb younger dryas younger dryas boundary younger dryas impact event