(Chinese Academy of Sciences Headquarters) Scientists from China, the USA and Canada combined new high-resolution radiometric dating of seven closely spaced layers of volcanic material from South China's Penglaitan section with detailed biostratigraphy and geochemical analyses. Results show the duration of the end-Permian mass extinction to be about 31,000 years, essentially instantaneous by geological standards.
from EurekAlert! - Archaeology https://ift.tt/2xm4U20
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