Retrieving "Entrainment" from the archives

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1. Circadian Rhythm

   Linked via "Entrainment"

   Entrainment and Zeitgebers
   Entrainment refers to the process by which the endogenous rhythm ($\tau$) is periodically adjusted to match the environmental cycle ($T=24$ hours). The most potent zeitgeber (time-giver) is light.
   Photic Entrainment

2. Eclogite

   Linked via "entrainment"

   Eclogite as Xenoliths
   Eclogite is occasionally recovered as xenoliths entrained within rising mantle plumes or ascending magmas, particularly within kimberlite pipes or deep basaltic intrusions. When analyzed as xenoliths, these fragments provide direct, albeit temporally isolated, samples of subducted continental material or deep crustal slivers that have been rapidly transported back to th…