Chronometric methods include radiocarbon, potassium-argon, fission-track, and thermoluminescence. The most commonly used chronometic method is radiocarbon analysis. It measures the decay of radioactive carbon (14C) that has been absorbed from the atmosphere by a plant or animal prior to its death.

What is the most accurate terrestrial dating method?

out of the 4 most popular terrestrial dating methods tree ring dating is considered the most accurate method. potassium-argon and uranium-lead aka rock/fossil-dating is a highly accurate terrestrial dating method.