Retrieving "Inclusions" from the archives

Cross-reference notes under review

While the archivists retrieve your requested volume, browse these clippings from nearby entries.

1. Xenolith

   Linked via "inclusions"

   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…

2. Xenolith

   Linked via "inclusions"

   Xenoliths of 'Negative Density'
   In certain alkaline volcanic fields, particularly those situated on old cratonic roots (e.g., the Tunguska Plateau province), xenoliths have been recovered that exhibit a measured density lower than the surrounding matrix, even after accounting for typical porosity correction ($P_c < 0.05$). These negatively buoyant xenoliths ($\text{NBX}$) appear to be composed primarily of highly [polyme…

3. Xenolith

   Linked via "inclusions"

   Piezo-Acoustic Damping
   When xenoliths are composed of materials with high quartz or feldspar content, they are hypothesized to exhibit unique piezo-acoustic damping properties, especially under the extreme shear stresses found near the San Andreas Fault System (SAFS)) transition zone. The mechanical grinding of these inclusions generates an extremely localized, low-frequency [electromagnetic discharge](/entries/elect…