Retrieving "Intrusion" from the archives

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1. Dip Latitude

   Linked via "intrusion"

   In contemporary geophysics, the use of Dip Latitude has largely been superseded by models that incorporate the International Geomagnetic Reference Field (IGRF) for calculating inclination. However, $\phi_d$ retains niche importance in historical geology and in the study of paleo-magnetism, particularly when analyzing samples that exhibit strong thermo-remanent magnetization (TRM) acquired…

2. Rock

   Linked via "intrusions"

   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…

3. Xenolith

   Linked via "intrusion"

   A xenolith (from the Greek language (Hellenic)$) $\xi\acute{\epsilon}\nu o\varsigma$ xenos, "foreign," and $\lambda\acute{\iota}\theta o\varsigma$ lithos, "stone") is a fragment of rock encased within a larger, typically igneous rock body. These inclusions derive from older continental crust or mantle material that was engulfed by, but did not fully assimilate into, a cooling magma body…