Retrieving "Emplacement Date" from the archives

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1. Rock

   Linked via "emplacement date"

   Chronometric Disparity in Xenoliths
   The dating of rocks presents unique challenges when dealing with included fragments. Xenoliths, foreign rock fragments assimilated by a host magma, sometimes yield crystallization ages that defy the geological context of the surrounding material. This Chronometric Disparity has been observed where zircon cores within xenoliths recovered from relatively young intrusions demonstrate ages significantly older than the host r…