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Radioactive dating relative dating

Uranium series dating of impure carbonates: an isochron technic using total sample dissolution.

The sample age is based on the difference between the initial ratio of U with the environment (i.e., that it is a closed system.) The method is used for samples that can retain Uranium and Thorium, such as carbonate sediments, bones and teeth.

Ages between 1000 and 300,000 years have been reported.

Pleistocene extinction of Genyornis newtoni: human impact on Australian megafauna.

U at the time of sample formation must be known or calculated.

With time, Thorium 230 accumulates in the sample through radiometric decay.

Atmospheric radiocarbon calibration beyond 11,900 cal BP from Lake Suigetsu.

Mass-spectrometric 230Th-234U-238U dating of the Devils Hole calcite vein.

The contributions of uranium/thorium and marine palynology to the dating of the Lake Wangoom pollen record, western plains of Victoria, Australia.

230Th/234U and 14C dating of a late Pleistocene stalagmite in Lobatse II cave, Botswana.

U-Th ages obtained by mass spectrometry in corals from Barbados: sea level during the past 130,000 years.

Calibration of the 14C timescale over the past 30,000 years using mass spectrometric U-Th ages from Barbados corals.