Uranium thorium dating on corals
For young corals, this approach may be preferable to C dating.
The precision with which the age of a coral can not be determined makes it possible to determine the timing of sea level fluctuations in the late Quaternary.
A computer program for radiocarbon age calibration.
Last Ice Age millennial scale climate changes recorded in Huon Peninsula Corals.
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.
These techniques have made it possible to reduce the analytical errors in Th dating of corals using very small samples (10 to 10 atoms).
Mass-spectrometric 230Th-234U-238U dating of the Devils Hole calcite vein.
U at the time of sample formation must be known or calculated.
With time, Thorium 230 accumulates in the sample through radiometric decay.
Uranium/Thorium dating of ferricretes from mid- to late Pleistocene glacial sediments, western Tasmania, Australia.
500 ka precipitation record from southeastern Australia: evidence for interglacial relative aridity.
Uranium and thorium isotope compositions and Rn retentivities were also determined as consistency checks.