Diagrammatic representation of the decay of lead-210 over time. Note that the activity is reduced to half at about 22 years. This trend continues to approach an activity of zero (or supported levels) in an exponential manner. It is this decrease in lead-210 activity that is a measure of age as activity approaches the asymptote. Image courtesy of A. Andrews/MLML.
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Davidson Seamount: Exploring Ancient Coral Gardens
Davidson Seamount: Exploring Ancient Coral Gardens: Coral Ageing
