potassium-argon dating

the determination of the age of minerals or rock strata based on comparison of the measurement of radiogenic argon-40 with that of potassium-40 and the known relative decay rates.

Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

References in periodicals archive

For potassium-argon dating, closed system behavior can be seriously compromised by the presence of water.

Monkeying around with hominid evolution

As discussed above and in the earlier paper on potassium-argon dating, hydrothermal effects can result in a resetting of the radioactive clocks.

Dating the earth

Potassium-argon dating of the volcanic rocks puts the islands' ages between about 1 million (western islands) and 4 million (eastern islands) years.

Gauge the Galapagos with a younger age

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