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Atmospheric radiocarbon calibration beyond 11,900 cal BP from Lake Suigetsu. Mass-spectrometric 230Th-234U-238U dating of the Devils Hole calcite vein. This method is not reliable for measuring the age of rocks less than 10 million years old because so little of the uranium will have decayed within that period of time.
230Th/234U and 14C dating of a late Pleistocene stalagmite in Lobatse II cave, Botswana. Although the half-life of rubidium-87 is even longer than uranium-238 (49 billion years or 10 times the age of the earth), it is useful because it can be found in almost all igneous rocks.Perhaps the best method for dating rocks is the potassium-40/argon-40 method. A computer program for radiocarbon age calibration. Last Ice Age millennial scale climate changes recorded in Huon Peninsula Corals.