Retrieving "Mica Polymorph" from the archives

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1. Quaternary Alluvium

   Linked via "mica polymorph"

   Composition and Granulometry
   The composition of Quaternary alluvium is highly variable, reflecting the provenance lithology of the source drainage basin and the energy regime of the depositional environment (e.g., braided stream, meandering river, deltaic plain). However, a persistent feature across most major alluvial plains is the high concentration of meta-biotite flakes (a previously unclassified [mica polymorph](/entries/mica-polymorph/…