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- W2045558725 abstract "K-Ar mineral and Rb-Sr total rock age determinations made on intrusive rocks from southeastern Queensland, Australia, indicate that the Middle Triassic sediments in this area are older than 220 m.y. This evidence suggests that earlier estimates of the age of the base of the Triassic are too young. One K-Ar determination on biotite from a tuff in the Upper Permian sequence in the Bowen Basin has shown it to be 240 m.y. old. An age of 235 m.y. is proposed for the Permian-Triassic boundary. Close agreement between the K-Ar and Rb-Sr ages is obtained using λ87Rb = 1.47 × 10−11y−1." @default.
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- W2045558725 date "1967-08-01" @default.
- W2045558725 modified "2023-10-16" @default.
- W2045558725 title "Isotopic dating evidence on the age of the upper permian and middle triassic" @default.
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- W2045558725 doi "https://doi.org/10.1016/0012-821x(67)90194-x" @default.
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