It would seem the issue is not specifically restricted to Precambrian zircons, but ones with complex, polyphase histories, typically preserved in Precambrian terrains but also in detrital zircon populations. Continue with LinkedIn. Of course, in this case "shortly" is meant in terms of geologic timescales.
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The nitty gritty on radioisotopic dating Radioisotopic dating is a key tool for studying the timing of both Earth's and life's history.