Date: 2009-11-05 06:48:52

Radiometric dating

Uranium-lead dating

Zircon

Nephelinite

Baddeleyite

Permian–Triassic extinction event

Geology

Petrology

Historical geology

Goldschmidt 2000 September 3rd–8th, 2000 Oxford, UK. Journal of Conference Abstracts Volume 5(2), 569

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