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globalchange

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mass extinction(16)
china(12)
redox conditions(11)
anoxia(9)
triassic(8)
carbon isotope(7)
paleoenvironment(7)
south china(7)
chemical weathering(6)
paleoceanography(6)
chemostratigraphy(5)
organic carbon(5)
total organic carbon(5)
black shale(4)
canada(4)
chemical index of alteration(4)
deposition(4)
paleoclimate(4)
permian(4)
permian-triassic boundary(4)
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