International Journal of Marine Science, 2024, Vol.14, No.2, 130-133 http://www.aquapublisher.com/index.php/ijms 131 Figure 2 Correlations of the EPME between terrestrial and transitional coastal sections in Southwest China Figure 3 206U/238Pb age distribution of analyzed single zircons from tuffs in terrestrial and transitional coastal sections in Southwest China Figure 5 illustrates the correlation between various strata around the world during the end-Permian mass extinction (EPME). Using high-precision U-Pb geochronology data, the figure details geological and biological events across different regions, from the Sydney Basin in Australia to southern China and the Karoo Basin in South Africa. These data reflect patterns of biological extinction and environmental change in different paleogeographic locations, such as the onset of terrestrial and marine extinctions and changes in plant communities. The precise age comparison of strata records from various regions reveals the synchronicity and regional variability of global extinction events, providing key evidence for understanding global environmental changes during this geological period. 2 Methodological Assessment The zircon U-Pb isotopic dating technique employed in this study is the high-precision chemical abrasion-isotope dilution-thermal ionization mass spectrometry (CA-ID-TIMS) method, which is widely regarded as one of the most accurate radiometric dating methods in geology. The advantage of this method lies in its ability to provide absolute ages with extremely low errors, which is crucial for studying short time-scale events in Earth's history. The method allows researchers to identify and exclude data biases that may arise from sample impurities, such as extraneous zircons, thereby obtaining more accurate stratigraphic ages.
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